diff --git a/plinth/locale/ar_SA/LC_MESSAGES/django.po b/plinth/locale/ar_SA/LC_MESSAGES/django.po
index 1651b06b6..fd322857d 100644
--- a/plinth/locale/ar_SA/LC_MESSAGES/django.po
+++ b/plinth/locale/ar_SA/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2020-06-10 15:41+0000\n"
 "Last-Translator: aiman an <an1f3@hotmail.com>\n"
 "Language-Team: Arabic (Saudi Arabia) <https://hosted.weblate.org/projects/"
@@ -986,7 +986,13 @@ msgstr ""
 msgid "Name of the new library"
 msgstr ""
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr ""
 
@@ -2516,7 +2522,7 @@ msgstr ""
 msgid "Wiki and Blog"
 msgstr ""
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr ""
 
@@ -3716,7 +3722,7 @@ msgid "Create Connection"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr ""
 
@@ -3763,7 +3769,7 @@ msgid "Computer"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr ""
 
@@ -3773,13 +3779,13 @@ msgstr ""
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr ""
@@ -4144,63 +4150,63 @@ msgstr ""
 msgid "Cannot show connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr ""
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr ""
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr ""
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr ""
 
diff --git a/plinth/locale/bg/LC_MESSAGES/django.po b/plinth/locale/bg/LC_MESSAGES/django.po
index b79d2d6e0..9af6814e6 100644
--- a/plinth/locale/bg/LC_MESSAGES/django.po
+++ b/plinth/locale/bg/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2022-03-04 21:35+0000\n"
 "Last-Translator: 109247019824 <stoyan@gmx.com>\n"
 "Language-Team: Bulgarian <https://hosted.weblate.org/projects/freedombox/"
@@ -1037,7 +1037,13 @@ msgstr ""
 msgid "Name of the new library"
 msgstr ""
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr ""
 
@@ -2567,7 +2573,7 @@ msgstr ""
 msgid "Wiki and Blog"
 msgstr ""
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr ""
 
@@ -3765,7 +3771,7 @@ msgid "Create Connection"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr ""
 
@@ -3812,7 +3818,7 @@ msgid "Computer"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr "Редактиране на връзката"
 
@@ -3822,13 +3828,13 @@ msgstr ""
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr ""
@@ -4193,63 +4199,63 @@ msgstr ""
 msgid "Cannot show connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr ""
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr ""
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr ""
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr ""
 
diff --git a/plinth/locale/bn/LC_MESSAGES/django.po b/plinth/locale/bn/LC_MESSAGES/django.po
index 14654b352..e4a2619a3 100644
--- a/plinth/locale/bn/LC_MESSAGES/django.po
+++ b/plinth/locale/bn/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2021-06-16 07:33+0000\n"
 "Last-Translator: Oymate <dhruboadittya96@gmail.com>\n"
 "Language-Team: Bengali <https://hosted.weblate.org/projects/freedombox/"
@@ -985,7 +985,13 @@ msgstr ""
 msgid "Name of the new library"
 msgstr ""
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr ""
 
@@ -2526,7 +2532,7 @@ msgstr "ইকিউইকি"
 msgid "Wiki and Blog"
 msgstr ""
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr ""
 
@@ -3724,7 +3730,7 @@ msgid "Create Connection"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr ""
 
@@ -3771,7 +3777,7 @@ msgid "Computer"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr ""
 
@@ -3781,13 +3787,13 @@ msgstr ""
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr ""
@@ -4152,63 +4158,63 @@ msgstr ""
 msgid "Cannot show connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr ""
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr ""
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr ""
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr ""
 
diff --git a/plinth/locale/cs/LC_MESSAGES/django.po b/plinth/locale/cs/LC_MESSAGES/django.po
index f4aff5d7c..2c4790fb0 100644
--- a/plinth/locale/cs/LC_MESSAGES/django.po
+++ b/plinth/locale/cs/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2022-03-04 12:58+0000\n"
 "Last-Translator: Jiří Podhorecký <j.podhorecky@volny.cz>\n"
 "Language-Team: Czech <https://hosted.weblate.org/projects/freedombox/"
@@ -1066,7 +1066,13 @@ msgstr "Knihovna e-knih"
 msgid "Name of the new library"
 msgstr "Název nové knihovny"
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr "Knihovna s tímto názvem již existuje."
 
@@ -1967,11 +1973,11 @@ msgid ""
 "Necessary aliases such as \"postmaster\" are automatically created pointing "
 "to the first admin user."
 msgstr ""
-"Každý uživatel na {box_name} dostane e-mailovou adresu jako user@"
-"mydomain.example. Budou také dostávat poštu ze všech adres, které vypadají "
-"jako user+foo@mydomain.example. Dále mohou ke své e-mailové adrese přidávat "
-"aliasy. Potřebné aliasy, jako například \"postmaster\", se vytvoří "
-"automaticky a ukazují na prvního uživatele-administrátora."
+"Každý uživatel na {box_name} dostane e-mailovou adresu jako user@mydomain."
+"example. Budou také dostávat poštu ze všech adres, které vypadají jako user"
+"+foo@mydomain.example. Dále mohou ke své e-mailové adrese přidávat aliasy. "
+"Potřebné aliasy, jako například \"postmaster\", se vytvoří automaticky a "
+"ukazují na prvního uživatele-administrátora."
 
 #: plinth/modules/email/__init__.py:37
 msgid ""
@@ -2839,7 +2845,7 @@ msgstr "ikiwiki"
 msgid "Wiki and Blog"
 msgstr "wiki a blog"
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr "Zobrazit a upravit wiki aplikace"
 
@@ -4245,7 +4251,7 @@ msgid "Create Connection"
 msgstr "Vytvořit připojení"
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr "Smazat připojení"
 
@@ -4292,7 +4298,7 @@ msgid "Computer"
 msgstr "Počítač"
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr "Upravit připojení"
 
@@ -4302,13 +4308,13 @@ msgstr "Připojení"
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr "Wi-Fi sítě poblíž"
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr "Přidat připojení"
@@ -4715,65 +4721,65 @@ msgstr "Síťová připojení"
 msgid "Cannot show connection: Connection not found."
 msgstr "Připojení nelze zobrazit: Připojení neexistuje."
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr "Informace o spojení"
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr "Připojení nelze upravit: Připojení neexistuje."
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr "Tento typ připojení ještě není podporován."
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr "Připojení {name} aktivováno."
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr "Aktivace připojení se nezdařila: Připojení nenalezeno."
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 "Nepodařilo se aktivovat připojení {name}: Není k dispozici žádné použitelné "
 "zařízení."
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr "Připojení {name} deaktivováno."
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr "Deaktivace připojení se nezdařila: Připojení nenalezeno."
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr "Přidávání nového generického připojení"
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr "Přidávání nového ethernetového připojení"
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr "Přidávání nového PPPoE připojení"
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr "Přidávání nového Wi-Fi připojení"
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr "Připojení {name} smazáno."
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr "Smazání připojení se nezdařilo: Připojení nenalezeno."
 
diff --git a/plinth/locale/da/LC_MESSAGES/django.po b/plinth/locale/da/LC_MESSAGES/django.po
index 4526e0c47..06b252896 100644
--- a/plinth/locale/da/LC_MESSAGES/django.po
+++ b/plinth/locale/da/LC_MESSAGES/django.po
@@ -9,7 +9,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: FreedomBox UI\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2021-01-18 12:32+0000\n"
 "Last-Translator: ikmaak <info@ikmaak.nl>\n"
 "Language-Team: Danish <https://hosted.weblate.org/projects/freedombox/"
@@ -1079,7 +1079,13 @@ msgstr "E-bogssamling"
 msgid "Name of the new library"
 msgstr "Den nye samlings navn"
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr "En samling med dette navn eksisterer allerede."
 
@@ -2892,7 +2898,7 @@ msgstr "wiki"
 msgid "Wiki and Blog"
 msgstr "Wiki & Blog"
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 #, fuzzy
 #| msgid "Services and Applications"
 msgid "View and edit wiki applications"
@@ -4252,7 +4258,7 @@ msgid "Create Connection"
 msgstr "Opret Forbindelse"
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr "Slet Forbindelse"
 
@@ -4299,7 +4305,7 @@ msgid "Computer"
 msgstr "Computer"
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr "Rediger Forbindelse"
 
@@ -4311,13 +4317,13 @@ msgstr "Forbindelse"
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr "Wi-Fi-netværk i Nærheden"
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr "Tilføj forbindelse"
@@ -4732,66 +4738,66 @@ msgstr "Netværksforbindelser"
 msgid "Cannot show connection: Connection not found."
 msgstr "Kan ikke vise forbindelse: Forbindelse ikke fundet."
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr "Forbindelsesinformation"
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr "Kan ikke redigere forbindelse: Forbindelse ikke fundet."
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr "Denne type forbindelse kan ikke konfigureres herfra endnu."
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr "Aktiverede forbindelse {name}."
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr "Kunne ikke aktivere forbindelse: Forbindelse ikke fundet."
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 "Kunne ikke aktivere forbindelse {name}: Ingen passende enhed er tilgængelig."
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr "Deaktiverede forbindelse {name}."
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr "Kan ikke deaktivere forbindelse: Forbindelse ikke fundet."
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 #, fuzzy
 #| msgid "Adding New Ethernet Connection"
 msgid "Adding New Generic Connection"
 msgstr "Tilføjer Ny Ethernet Forbindelse"
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr "Tilføjer Ny Ethernet Forbindelse"
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr "Tilføjer Ny PPPoE Forbindelse"
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr "Tilføjer Ny Wi-Fi Forbindelse"
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr "Slettede forbindelse {name}."
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr "Kunne ikke slette forbindelse: Forbindelse ikke fundet."
 
diff --git a/plinth/locale/de/LC_MESSAGES/django.po b/plinth/locale/de/LC_MESSAGES/django.po
index 3c2e13053..e57a6b9cb 100644
--- a/plinth/locale/de/LC_MESSAGES/django.po
+++ b/plinth/locale/de/LC_MESSAGES/django.po
@@ -9,7 +9,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: FreedomBox UI\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2022-03-04 12:58+0000\n"
 "Last-Translator: Johannes Keyser <joke@fsfe.org>\n"
 "Language-Team: German <https://hosted.weblate.org/projects/freedombox/"
@@ -1093,7 +1093,13 @@ msgstr "E-Book-Bibliothek"
 msgid "Name of the new library"
 msgstr "Name der neuen Bibliothek"
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr "Eine Bibliothek mit diesem Namen ist bereits vorhanden."
 
@@ -1997,9 +2003,9 @@ msgid ""
 "your mailbox using IMAP and POP3. Rspamd deals with spam."
 msgstr ""
 "Dies ist eine vollständige E-Mail-Serverlösung, die Postfix, Dovecot und "
-"Rspamd verwendet. Postfix sendet und empfängt E-Mails. Dovecot ermöglicht E"
-"-Mail-Clients den Zugriff auf Ihre Mailbox über IMAP und POP3. Rspamd "
-"kümmert sich um Spam."
+"Rspamd verwendet. Postfix sendet und empfängt E-Mails. Dovecot ermöglicht E-"
+"Mail-Clients den Zugriff auf Ihre Mailbox über IMAP und POP3. Rspamd kümmert "
+"sich um Spam."
 
 #: plinth/modules/email/__init__.py:31
 #, python-brace-format
@@ -2011,9 +2017,9 @@ msgid ""
 "to the first admin user."
 msgstr ""
 "Jeder Benutzer der {box_name} erhält eine E-Mail-Adresse wie benutzer@meine-"
-"domain.beispiel. Man erhält auch E-Mails von allen Adressen wie benutzer+bla"
-"@meine-domain.beispiel. Außerdem können alle Benutzer ihrer E-Mail-Adresse "
-"Aliasnamen hinzufügen. Notwendige Aliase wie \"postmaster\" werden "
+"domain.beispiel. Man erhält auch E-Mails von allen Adressen wie benutzer"
+"+bla@meine-domain.beispiel. Außerdem können alle Benutzer ihrer E-Mail-"
+"Adresse Aliasnamen hinzufügen. Notwendige Aliase wie \"postmaster\" werden "
 "automatisch erstellt und verweisen auf den ersten Admin-Benutzer."
 
 #: plinth/modules/email/__init__.py:37
@@ -2899,7 +2905,7 @@ msgstr "ikiwiki"
 msgid "Wiki and Blog"
 msgstr "Wiki und Blog"
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr "Wiki-Anwendungen ansehen und bearbeiten"
 
@@ -4331,7 +4337,7 @@ msgid "Create Connection"
 msgstr "Verbindung anlegen"
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr "Verbindung löschen"
 
@@ -4378,7 +4384,7 @@ msgid "Computer"
 msgstr "Computer"
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr "Verbindung bearbeiten"
 
@@ -4388,13 +4394,13 @@ msgstr "Verbindungen"
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr "WLANs in der Nähe"
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr "Verbindung hinzufügen"
@@ -4805,65 +4811,65 @@ msgstr "Netzwerkverbindungen"
 msgid "Cannot show connection: Connection not found."
 msgstr "Kann Verbindung nicht anzeigen: Verbindung nicht gefunden."
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr "Verbindungsinformationen"
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr "Kann Verbindung nicht bearbeiten: Verbindung nicht gefunden."
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr "Dieser Verbindungstyp ist noch nicht bekannt."
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr "Verbindung {name} aktiviert."
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr "Fehler beim Einschalten der Verbindung: Verbindung nicht gefunden."
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 "Fehler beim Einschalten der Verbindung {name}: Kein geeignetes Gerät "
 "verfügbar."
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr "Verbindung {name} ausgeschaltet."
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr "Konnte Verbindung nicht ausschalten: Verbindung nicht gefunden."
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr "Neue generische Verbindung wird hinzugefügt"
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr "Neue Ethernet-Verbindung wird hinzugefügt"
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr "Neue PPPoE-Verbindung wird hinzugefügt"
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr "WLAN-Verbindung wird hinzugefügt"
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr "Verbindung {name} gelöscht."
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr "Konnte Verbindung nicht löschen: Verbindung nicht gefunden."
 
diff --git a/plinth/locale/django.pot b/plinth/locale/django.pot
index 3341552aa..5a2dfbdd5 100644
--- a/plinth/locale/django.pot
+++ b/plinth/locale/django.pot
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -983,7 +983,13 @@ msgstr ""
 msgid "Name of the new library"
 msgstr ""
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr ""
 
@@ -2511,7 +2517,7 @@ msgstr ""
 msgid "Wiki and Blog"
 msgstr ""
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr ""
 
@@ -3709,7 +3715,7 @@ msgid "Create Connection"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr ""
 
@@ -3756,7 +3762,7 @@ msgid "Computer"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr ""
 
@@ -3766,13 +3772,13 @@ msgstr ""
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr ""
@@ -4137,63 +4143,63 @@ msgstr ""
 msgid "Cannot show connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr ""
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr ""
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr ""
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr ""
 
diff --git a/plinth/locale/el/LC_MESSAGES/django.po b/plinth/locale/el/LC_MESSAGES/django.po
index 058fd1242..24ad592ed 100644
--- a/plinth/locale/el/LC_MESSAGES/django.po
+++ b/plinth/locale/el/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2021-04-14 04:27+0000\n"
 "Last-Translator: Michalis <michalisntovas@yahoo.gr>\n"
 "Language-Team: Greek <https://hosted.weblate.org/projects/freedombox/"
@@ -1111,7 +1111,13 @@ msgstr ""
 msgid "Name of the new library"
 msgstr "Όνομα του αποθετηρίου"
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 #, fuzzy
 #| msgid "A share with this name already exists."
 msgid "A library with this name already exists."
@@ -2981,7 +2987,7 @@ msgstr "ikiwiki"
 msgid "Wiki and Blog"
 msgstr "Wiki και Blog"
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr "Προβολή και επεξεργασία εφαρμογών wiki"
 
@@ -4357,7 +4363,7 @@ msgid "Create Connection"
 msgstr "Δημιουργία σύνδεσης"
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr "Διαγραφή σύνδεσης"
 
@@ -4404,7 +4410,7 @@ msgid "Computer"
 msgstr "Υπολογιστής"
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr "Επεξεργασία σύνδεσης"
 
@@ -4414,13 +4420,13 @@ msgstr "Συνδέσεις"
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr "Κοντινά δίκτυα Wi-Fi"
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr "Προσθήκη σύνδεσης"
@@ -4845,65 +4851,65 @@ msgstr "Συνδέσεις δικτύου"
 msgid "Cannot show connection: Connection not found."
 msgstr "Δεν είναι δυνατή η εμφάνιση της σύνδεσης: δεν βρέθηκε σύνδεση."
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr "Πληροφορίες σύνδεσης"
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr "Δεν είναι δυνατή η επεξεργασία της σύνδεσης: δεν βρέθηκε σύνδεση."
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr "Αυτός ο τύπος σύνδεσης δεν έχει κατανοηθεί ακόμα."
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr "H σύνδεση {name} ενεργοποιήθηκε."
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr "Απέτυχε η ενεργοποίηση της σύνδεσης: η σύνδεση δεν βρέθηκε."
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 "Απέτυχε η ενεργοποίηση της σύνδεσης {name}: δεν υπάρχει διαθέσιμη κατάλληλη "
 "συσκευή."
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr "Aπενεργοποιήθηκε η σύνδεση {name}."
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr "Απέτυχε η απενεργοποίηση της σύνδεσης: η σύνδεση δεν βρέθηκε."
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr "Προσθήκη νέας γενικής σύνδεσης"
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr "Προσθήκη νέας σύνδεσης Ethernet"
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr "Προσθήκη νέας σύνδεσης PPPoE"
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr "Προσθήκη νέας σύνδεσης Wi-Fi"
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr "Η σύνδεση {name} διαγράφηκε."
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr "Απέτυχε η διαγραφή της σύνδεσης: η σύνδεση δεν βρέθηκε."
 
diff --git a/plinth/locale/es/LC_MESSAGES/django.po b/plinth/locale/es/LC_MESSAGES/django.po
index b27b29b84..2e35d35e1 100644
--- a/plinth/locale/es/LC_MESSAGES/django.po
+++ b/plinth/locale/es/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2022-03-10 22:59+0000\n"
 "Last-Translator: Nathaniel Ramos Alexander <rhelmuth@princeton.edu>\n"
 "Language-Team: Spanish <https://hosted.weblate.org/projects/freedombox/"
@@ -1090,7 +1090,13 @@ msgstr "Biblioteca de libros electrónicos"
 msgid "Name of the new library"
 msgstr "Nombre de la nueva biblioteca"
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr "Ya existe una biblioteca con este nombre."
 
@@ -2900,7 +2906,7 @@ msgstr "ikiwiki"
 msgid "Wiki and Blog"
 msgstr "Wiki y Blog"
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr "Aplicaciones wiki para ver y editar"
 
@@ -4314,7 +4320,7 @@ msgid "Create Connection"
 msgstr "Crear conexión"
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr "Eliminar conexión"
 
@@ -4361,7 +4367,7 @@ msgid "Computer"
 msgstr "Ordenador"
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr "Editar conexión"
 
@@ -4371,13 +4377,13 @@ msgstr "Conexiones"
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr "Redes Wi-Fi cercanas"
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr "Añadir conexión"
@@ -4783,65 +4789,65 @@ msgstr "Conexiones de red"
 msgid "Cannot show connection: Connection not found."
 msgstr "No se puede mostrar la conexión: no se encontró."
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr "Información de la conexión"
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr "No se puede editar la conexión: no se encontró."
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr "Este tipo de conexión no está aún soportada."
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr "Activar conexión {name}."
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr "Ha fallado la activación de la conexión: no se encontró."
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 "Ha fallado la activación de la conexión {name}: no hay ningún dispositivo "
 "disponible."
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr "Conexión {name} desactivada."
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr "Ha fallado la desactivación de la conexión: no se encontró."
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr "Añadir nueva conexión genérica"
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr "Añadir nueva conexión Ethernet"
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr "Añadir nueva conexión PPPoE"
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr "Añadir nueva conexión Wi-Fi"
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr "Conexión {name} eliminada."
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr "Ha fallado la eliminación de la conexión: no se encontró."
 
diff --git a/plinth/locale/fa/LC_MESSAGES/django.po b/plinth/locale/fa/LC_MESSAGES/django.po
index 40ceba687..9c29ab155 100644
--- a/plinth/locale/fa/LC_MESSAGES/django.po
+++ b/plinth/locale/fa/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2021-09-07 11:34+0000\n"
 "Last-Translator: Seyed mohammad ali Hosseinifard <ali_hosseine@yahoo.com>\n"
 "Language-Team: Persian <https://hosted.weblate.org/projects/freedombox/"
@@ -1082,7 +1082,13 @@ msgstr ""
 msgid "Name of the new library"
 msgstr "ساختن اتصال"
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr ""
 
@@ -2849,7 +2855,7 @@ msgstr ""
 msgid "Wiki and Blog"
 msgstr "مدیریت ویکی‌ها و وبلاگ‌ها"
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 #, fuzzy
 msgid "View and edit wiki applications"
 msgstr "سرویس‌ها و برنامه‌ها"
@@ -4168,7 +4174,7 @@ msgid "Create Connection"
 msgstr "ساختن اتصال"
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr "پاک‌کردن اتصال"
 
@@ -4216,7 +4222,7 @@ msgid "Computer"
 msgstr "کامپیوتر"
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr "ویرایش اتصال"
 
@@ -4228,13 +4234,13 @@ msgstr "اتصال"
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr "شبکه‌های بی‌سیم در نزدیکی"
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr "افزودن اتصال"
@@ -4651,63 +4657,63 @@ msgstr "اتصال‌های شبکه"
 msgid "Cannot show connection: Connection not found."
 msgstr "نمی‌توان اتصال را نشان داد: اتصالی پیدا نشد."
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr "اطلاعات اتصال"
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr "نمی‌توان اتصال را ویراست: اتصالی پیدا نشد."
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr "از این نوع اتصال هنوز پشتیبانی نمی‌شود."
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr "اتصال {name} فعال شد."
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr "فعال‌سازی اتصال شکست خورد: اتصالی پیدا نشد."
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr "فعال‌سازی اتصال {name} شکست خورد: دستگاه مناسبی موجود نیست."
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr "اتصال {name} غیرفعال شد."
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr "غیرفعال‌سازی اتصال شکست خورد: اتصالی پیدا نشد."
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr "افزودن یک اتصال عام تازه"
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr "افزودن اتصال اترنت تازه"
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr "افزودن اتصال PPPoE تازه"
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr "افزودن اتصال Wi-Fi تازه"
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr "اتصال {name} پاک شد."
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr "پاک‌کردن اتصال شکست خورد: اتصال پیدا نشد."
 
diff --git a/plinth/locale/fake/LC_MESSAGES/django.po b/plinth/locale/fake/LC_MESSAGES/django.po
index 1cce16565..fb56ee61b 100644
--- a/plinth/locale/fake/LC_MESSAGES/django.po
+++ b/plinth/locale/fake/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: Plinth 0.6\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2016-01-31 22:24+0530\n"
 "Last-Translator: Sunil Mohan Adapa <sunil@medhas.org>\n"
 "Language-Team: Plinth Developers <freedombox-discuss@lists.alioth.debian."
@@ -1126,7 +1126,13 @@ msgstr ""
 msgid "Name of the new library"
 msgstr "CREATE USER"
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 #, fuzzy
 #| msgid "This service already exists"
 msgid "A library with this name already exists."
@@ -2965,7 +2971,7 @@ msgstr "WIKI"
 msgid "Wiki and Blog"
 msgstr "WIKI AND BLOG"
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 #, fuzzy
 #| msgid "Services and Applications"
 msgid "View and edit wiki applications"
@@ -4316,7 +4322,7 @@ msgid "Create Connection"
 msgstr "CREATE CONNECTION"
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr "DELETE CONNECTION"
 
@@ -4363,7 +4369,7 @@ msgid "Computer"
 msgstr "COMPUTER"
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr "EDIT CONNECTION"
 
@@ -4375,13 +4381,13 @@ msgstr "CONNECTION"
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr "NEARBY WI-FI NETWORKS"
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr "ADD CONNECTION"
@@ -4796,67 +4802,67 @@ msgstr "NETWORK CONNECTIONS"
 msgid "Cannot show connection: Connection not found."
 msgstr "CANNOT SHOW CONNECTION: CONNECTION NOT FOUND."
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 #, fuzzy
 #| msgid "Show Connection information"
 msgid "Connection Information"
 msgstr "SHOW CONNECTION INFORMATION"
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr "CANNOT EDIT CONNECTION: CONNECTION NOT FOUND."
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr "THIS TYPE OF CONNECTION IS NOT YET UNDERSTOOD."
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr "ACTIVATED CONNECTION {name}."
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr "FAILED TO ACTIVATE CONNECTION: CONNECTION NOT FOUND."
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr "FAILED TO ACTIVATE CONNECTION {name}: NO SUITABLE DEVICE IS AVAILABLE."
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr "DEACTIVATED CONNECTION {name}."
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr "FAILED TO DE-ACTIVATE CONNECTION: CONNECTION NOT FOUND."
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 #, fuzzy
 #| msgid "Adding New Ethernet Connection"
 msgid "Adding New Generic Connection"
 msgstr "ADDING NEW ETHERNET CONNECTION"
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr "ADDING NEW ETHERNET CONNECTION"
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr "ADDING NEW PPPOE CONNECTION"
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr "ADDING NEW WI-FI CONNECTION"
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr "CONNECTION {name} DELETED."
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr "FAILED TO DELETE CONNECTION: CONNECTION NOT FOUND."
 
diff --git a/plinth/locale/fr/LC_MESSAGES/django.po b/plinth/locale/fr/LC_MESSAGES/django.po
index 1440556d8..8f28637c9 100644
--- a/plinth/locale/fr/LC_MESSAGES/django.po
+++ b/plinth/locale/fr/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: FreedomBox UI\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2022-03-20 14:17+0000\n"
 "Last-Translator: Coucouf <coucouf@coucouf.fr>\n"
 "Language-Team: French <https://hosted.weblate.org/projects/freedombox/"
@@ -1092,7 +1092,13 @@ msgstr "Bibliothèque de livres numériques"
 msgid "Name of the new library"
 msgstr "Nom de la collection"
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr "Une collection portant ce nom existe déjà."
 
@@ -1655,9 +1661,9 @@ msgid ""
 msgstr ""
 "Si vous cherchez un compte DNS dynamique gratuit, vous pouvez chercher un "
 "service compatible GnuDIP sur <a href=\"https://ddns.freedombox.org\" target="
-"\"_blank\">ddns.freedombox.org</a> ou un service à base d’URL d’"
-"actualisation sur <a href=\"http://freedns.afraid.org/\" target=\"_blank\""
-">freedns.afraid.org</a>."
+"\"_blank\">ddns.freedombox.org</a> ou un service à base d’URL "
+"d’actualisation sur <a href=\"http://freedns.afraid.org/\" target=\"_blank"
+"\">freedns.afraid.org</a>."
 
 #: plinth/modules/dynamicdns/__init__.py:64
 msgid "Dynamic DNS Client"
@@ -2018,12 +2024,12 @@ msgid ""
 "Necessary aliases such as \"postmaster\" are automatically created pointing "
 "to the first admin user."
 msgstr ""
-"La {box_name} fournit une adresse de courriel du type utilisateur@"
-"mondomaine.exemple à chaque utilisateur. L’utilisateur recevra aussi "
-"courriels envoyés aux adresses telles que utilisateur+quelquechose@"
-"mondomaine.exemple. Les alias de courriels requis pour le fonctionnement du "
-"serveur tels que « postmaster » sont créés automatiquement, pointant vers le "
-"premier compte administrateur."
+"La {box_name} fournit une adresse de courriel du type utilisateur@mondomaine."
+"exemple à chaque utilisateur. L’utilisateur recevra aussi courriels envoyés "
+"aux adresses telles que utilisateur+quelquechose@mondomaine.exemple. Les "
+"alias de courriels requis pour le fonctionnement du serveur tels que "
+"« postmaster » sont créés automatiquement, pointant vers le premier compte "
+"administrateur."
 
 #: plinth/modules/email/__init__.py:37
 msgid ""
@@ -2918,7 +2924,7 @@ msgstr "ikiwiki"
 msgid "Wiki and Blog"
 msgstr "Wiki et blogue"
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr "Consultation et modification des applications de wiki"
 
@@ -4352,7 +4358,7 @@ msgid "Create Connection"
 msgstr "Créer Connexion"
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr "Supprimer Connexion"
 
@@ -4399,7 +4405,7 @@ msgid "Computer"
 msgstr "Machine"
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr "Modifier la connexion"
 
@@ -4409,13 +4415,13 @@ msgstr "Connexions"
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr "Réseaux Wi-Fi à proximité"
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr "Ajouter une connexion"
@@ -4829,66 +4835,66 @@ msgid "Cannot show connection: Connection not found."
 msgstr ""
 "Impossible d’afficher les détails de la connexion : connexion introuvable."
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr "Informations sur la connexion"
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr "Impossible de modifier la connexion : connexion introuvable."
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr ""
 "La configuration de ce type de connexion n'est pas encore pris en charge."
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr "Connexion {name} activée."
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr "Échec d’activation de la connexion : connexion introuvable."
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 "Échec d’activation de la connexion {name} : pas de périphérique adéquat "
 "disponible."
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr "Connexion {name} désactivée."
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr "Échec de désactivation de la connexion : connexion introuvable."
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr "Ajout d'une nouvelle connexion générique"
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr "Ajout d’une nouvelle connexion Ethernet"
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr "Ajout d’une nouvelle connexion PPPoE"
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr "Ajout d’une nouvelle connexion Wi-Fi"
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr "Connexion {name} supprimée."
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr "Échec de suppression de la connexion : connexion introuvable."
 
diff --git a/plinth/locale/gl/LC_MESSAGES/django.po b/plinth/locale/gl/LC_MESSAGES/django.po
index 297519724..37bd98cb3 100644
--- a/plinth/locale/gl/LC_MESSAGES/django.po
+++ b/plinth/locale/gl/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2021-01-18 12:32+0000\n"
 "Last-Translator: ikmaak <info@ikmaak.nl>\n"
 "Language-Team: Galician <https://hosted.weblate.org/projects/freedombox/"
@@ -989,7 +989,13 @@ msgstr ""
 msgid "Name of the new library"
 msgstr ""
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr ""
 
@@ -2521,7 +2527,7 @@ msgstr ""
 msgid "Wiki and Blog"
 msgstr ""
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr ""
 
@@ -3723,7 +3729,7 @@ msgid "Create Connection"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr ""
 
@@ -3770,7 +3776,7 @@ msgid "Computer"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr ""
 
@@ -3780,13 +3786,13 @@ msgstr ""
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr ""
@@ -4153,63 +4159,63 @@ msgstr ""
 msgid "Cannot show connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr ""
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr ""
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr ""
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr ""
 
diff --git a/plinth/locale/gu/LC_MESSAGES/django.po b/plinth/locale/gu/LC_MESSAGES/django.po
index 5ae36edac..8e2442a01 100644
--- a/plinth/locale/gu/LC_MESSAGES/django.po
+++ b/plinth/locale/gu/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2021-01-18 12:32+0000\n"
 "Last-Translator: ikmaak <info@ikmaak.nl>\n"
 "Language-Team: Gujarati <https://hosted.weblate.org/projects/freedombox/"
@@ -1043,7 +1043,13 @@ msgstr ""
 msgid "Name of the new library"
 msgstr "દસ્તાવેજીકરણ"
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr ""
 
@@ -2731,7 +2737,7 @@ msgstr ""
 msgid "Wiki and Blog"
 msgstr ""
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr ""
 
@@ -3952,7 +3958,7 @@ msgid "Create Connection"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr ""
 
@@ -3999,7 +4005,7 @@ msgid "Computer"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr ""
 
@@ -4011,13 +4017,13 @@ msgstr "વાતચીત"
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr ""
@@ -4397,63 +4403,63 @@ msgstr ""
 msgid "Cannot show connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr ""
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr ""
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr ""
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr ""
 
diff --git a/plinth/locale/hi/LC_MESSAGES/django.po b/plinth/locale/hi/LC_MESSAGES/django.po
index c398e68ba..caaa5944c 100644
--- a/plinth/locale/hi/LC_MESSAGES/django.po
+++ b/plinth/locale/hi/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2021-01-18 12:32+0000\n"
 "Last-Translator: ikmaak <info@ikmaak.nl>\n"
 "Language-Team: Hindi <https://hosted.weblate.org/projects/freedombox/"
@@ -1103,7 +1103,13 @@ msgstr ""
 msgid "Name of the new library"
 msgstr "शेयर का नाम"
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 #, fuzzy
 #| msgid "A share with this name already exists."
 msgid "A library with this name already exists."
@@ -2918,7 +2924,7 @@ msgstr "इकिविकि"
 msgid "Wiki and Blog"
 msgstr "विकि और ब्लॉग"
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr "विकी एप्लिकेशन को देखें और संपादित करें"
 
@@ -4230,7 +4236,7 @@ msgid "Create Connection"
 msgstr "कनेक्शन बनाएँ"
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr "कनेक्शन हटाएँ"
 
@@ -4277,7 +4283,7 @@ msgid "Computer"
 msgstr "कंप्यूटर"
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr "कनेक्शन संपादित करें"
 
@@ -4289,13 +4295,13 @@ msgstr "कनेक्शन"
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr "पास के वाई-फाई नेटवर्क"
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr "कनेक्शन जोड़ें"
@@ -4720,63 +4726,63 @@ msgstr "नेटवर्क कनेक्शन्स"
 msgid "Cannot show connection: Connection not found."
 msgstr "कनेक्शन नहीं दिखा सकता: कनेक्शन से नहीं मिला."
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr "कनेक्शन के बारे में जानकारी"
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr "कनेक्शन नहीं संपादित कर सकता: कनेक्शन से नहीं मिला."
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr "इस प्रकार का कनेक्शन अभी समझ में नहीं आता."
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr "कनेक्शन सक्रिय है {name}."
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr "कनेक्शन सक्रिय करने में विफल:  कनेक्शन नहीं मिला."
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr "कनेक्शन सक्रिय करने में विफल {name}: कोई उपयुक्त डिवाइस उपलब्ध नहीं है."
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr "निष्क्रिय कनेक्शन {name}."
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr "कनेक्शन को निष्क्रिय करने में विफल: कनेक्शन नहीं मिला."
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr "नया जेनेरिक कनेक्शन जोड़ रहा है"
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr "नया ईथरनेट कनेक्शन जोड़ रहा है"
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr "नया PPPoE कनेक्शन जोड़ रहा है"
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr "नया वाई-फाई कनेक्शन जोड़ रहा है"
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr "कनेक्शन {name} हटाया गया."
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr "कनेक्शन हटाने में विफल: कनेक्शन नहीं मिला."
 
diff --git a/plinth/locale/hu/LC_MESSAGES/django.po b/plinth/locale/hu/LC_MESSAGES/django.po
index ce8a391cf..19be928a6 100644
--- a/plinth/locale/hu/LC_MESSAGES/django.po
+++ b/plinth/locale/hu/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2022-03-10 22:59+0000\n"
 "Last-Translator: Benedek Nagy <benedek@bndk.club>\n"
 "Language-Team: Hungarian <https://hosted.weblate.org/projects/freedombox/"
@@ -1081,7 +1081,13 @@ msgstr "E-könyvtár"
 msgid "Name of the new library"
 msgstr "Az új könyvtár neve"
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr "Már létezik ilyen nevű könyvtár."
 
@@ -1629,8 +1635,8 @@ msgid ""
 "href='http://freedns.afraid.org/' target='_blank'>freedns.afraid.org</a>."
 msgstr ""
 "Ha ingyenes dinamikus DNS fiókot keresel, használhatod az ingyenes GnuDIP "
-"szolgáltatást a <a href=\"https://ddns.freedombox.org).\" target=\"_blank\""
-">ddns.freedombox.org</a> címen vagy az ingyenes frissítési URL alapú "
+"szolgáltatást a <a href=\"https://ddns.freedombox.org).\" target=\"_blank"
+"\">ddns.freedombox.org</a> címen vagy az ingyenes frissítési URL alapú "
 "szolgáltatást a <a href=\"http://freedns.afraid.org/\" target=\"_blank\"> "
 "freedns.afraid.org</a> címen."
 
@@ -2875,7 +2881,7 @@ msgstr "ikiwiki"
 msgid "Wiki and Blog"
 msgstr "Wiki és blog"
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr "Wiki alkalmazások megtekintése és szerkesztése"
 
@@ -4295,7 +4301,7 @@ msgid "Create Connection"
 msgstr "Kapcsolat létrehozása"
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr "Kapcsolat törlése"
 
@@ -4342,7 +4348,7 @@ msgid "Computer"
 msgstr "Számítógép"
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr "Kapcsolat szerkesztése"
 
@@ -4352,13 +4358,13 @@ msgstr "Kapcsolatok"
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr "Wi-Fi hálózatok a közelben"
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr "Kapcsolat hozzáadása"
@@ -4765,65 +4771,65 @@ msgstr "Hálózati kapcsolatok"
 msgid "Cannot show connection: Connection not found."
 msgstr "Nem jeleníthető meg a kapcsolat, mivel nem található."
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr "Információ a kapcsolatról"
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr "A kapcsolat nem szerkeszthető, mivel nem található."
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr "Az ilyen típusú kapcsolat még nem ismert."
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr "{name} kapcsolat aktiválva."
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr "Kapcsolat aktiválása sikertelen: kapcsolat nem található."
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 "{name} kapcsolat aktiválása sikertelen: nem áll rendelkezésre megfelelő "
 "eszköz."
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr "{name} kapcsolat deaktiválva."
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr "Kapcsolat deaktiválása sikertelen: kapcsolat nem található."
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr "Új általános kapcsolat hozzáadása"
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr "Új Ethernet kapcsolat hozzáadása"
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr "Új PPPoE kapcsolat hozzáadása"
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr "Új Wi-Fi kapcsolat hozzáadása"
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr "Kapcsolat törölve: {name}."
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr "A kapcsolat törlése sikertelen, mivel nem található."
 
diff --git a/plinth/locale/id/LC_MESSAGES/django.po b/plinth/locale/id/LC_MESSAGES/django.po
index 22e7bac49..31e45d6bd 100644
--- a/plinth/locale/id/LC_MESSAGES/django.po
+++ b/plinth/locale/id/LC_MESSAGES/django.po
@@ -2,7 +2,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: Indonesian (FreedomBox)\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2021-06-24 00:42+0000\n"
 "Last-Translator: Reza Almanda <rezaalmanda27@gmail.com>\n"
 "Language-Team: Indonesian <https://hosted.weblate.org/projects/freedombox/"
@@ -1068,7 +1068,13 @@ msgstr "Perpustakaan e-book"
 msgid "Name of the new library"
 msgstr "Nama perpustakaan baru"
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr "Perpustakaan dengan nama ini sudah ada."
 
@@ -2879,7 +2885,7 @@ msgstr "Ikiwiki"
 msgid "Wiki and Blog"
 msgstr "Wiki dan Blog"
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr "Lihat dan edit aplikasi Wiki"
 
@@ -4117,7 +4123,7 @@ msgid "Create Connection"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr "Hapus Koneksi"
 
@@ -4164,7 +4170,7 @@ msgid "Computer"
 msgstr "Komputer"
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr "Sunting Koneksi"
 
@@ -4174,13 +4180,13 @@ msgstr "Koneksi"
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr "Jaringan Wi-Fi terdekat"
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr "Tambah Koneksi"
@@ -4545,63 +4551,63 @@ msgstr "Koneksi Jaringan"
 msgid "Cannot show connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr ""
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr ""
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr "Menambah koneksi generik baru"
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr "Menambah koneksi ethernet baru"
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr "Menambah koneksi PPPoE baru"
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr "Menambah koneksi Wi-Fi baru"
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr "Koneksi {name} dihapus."
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr ""
 
diff --git a/plinth/locale/it/LC_MESSAGES/django.po b/plinth/locale/it/LC_MESSAGES/django.po
index 64bc4e6f4..7bbf7482e 100644
--- a/plinth/locale/it/LC_MESSAGES/django.po
+++ b/plinth/locale/it/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2022-01-06 22:41+0000\n"
 "Last-Translator: Dietmar <sagen@permondes.de>\n"
 "Language-Team: Italian <https://hosted.weblate.org/projects/freedombox/"
@@ -1056,7 +1056,13 @@ msgstr ""
 msgid "Name of the new library"
 msgstr "Nome della nuova libreria"
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr "Esiste già una libreria con questo nome."
 
@@ -2856,7 +2862,7 @@ msgstr "ikiwiki"
 msgid "Wiki and Blog"
 msgstr "Wiki e Blog"
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr "Vedi e modifica le applicazioni wiki"
 
@@ -4183,7 +4189,7 @@ msgid "Create Connection"
 msgstr "Crea Connessione"
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr "Cancella Connessione"
 
@@ -4230,7 +4236,7 @@ msgid "Computer"
 msgstr "Computer"
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr "Modifica Concessione"
 
@@ -4240,13 +4246,13 @@ msgstr "Connessioni"
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr "Reti WiFi vicine"
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr "Aggiungi Connessione"
@@ -4611,65 +4617,65 @@ msgstr "Connessione di rete"
 msgid "Cannot show connection: Connection not found."
 msgstr "Non è possibile mostrare la connessione: Connessione non trovata."
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr "Informazioni Connessione"
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr "Impossibile modificare la connessione: connessione non trovata."
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr "Questo tipo di connessione non è ancora riconosciuto."
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr "Attivata connessione {name}."
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr "Attivazione connessione fallita: connessione non trovata."
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 "Attivazione connessione {name} fallita: non è disponibile nessun dispositivo "
 "idoneo."
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr "Disattivata connessione {name}."
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr "Disattivazione connessione fallita: connessione non trovata."
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr "Aggiungendo Nuova Connessione Generica"
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr "Aggiungendo Nuova Connessione Ethernet"
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr "Aggiungendo Nuova Connessione PPPoE"
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr "Aggiungendo Nuova Connessione WiFi"
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr "Connessione {name} cancellata."
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr "Cancellazione connessione fallita: connessione non trovata."
 
diff --git a/plinth/locale/ja/LC_MESSAGES/django.po b/plinth/locale/ja/LC_MESSAGES/django.po
index 381109a45..775297637 100644
--- a/plinth/locale/ja/LC_MESSAGES/django.po
+++ b/plinth/locale/ja/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2021-05-20 12:32+0000\n"
 "Last-Translator: Jacque Fresco <aidter@use.startmail.com>\n"
 "Language-Team: Japanese <https://hosted.weblate.org/projects/freedombox/"
@@ -985,7 +985,13 @@ msgstr ""
 msgid "Name of the new library"
 msgstr ""
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr ""
 
@@ -2513,7 +2519,7 @@ msgstr ""
 msgid "Wiki and Blog"
 msgstr ""
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr ""
 
@@ -3711,7 +3717,7 @@ msgid "Create Connection"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr ""
 
@@ -3758,7 +3764,7 @@ msgid "Computer"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr ""
 
@@ -3768,13 +3774,13 @@ msgstr ""
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr ""
@@ -4139,63 +4145,63 @@ msgstr ""
 msgid "Cannot show connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr ""
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr ""
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr ""
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr ""
 
diff --git a/plinth/locale/kn/LC_MESSAGES/django.po b/plinth/locale/kn/LC_MESSAGES/django.po
index 9124b30b6..d841a1f5b 100644
--- a/plinth/locale/kn/LC_MESSAGES/django.po
+++ b/plinth/locale/kn/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2020-07-16 16:41+0000\n"
 "Last-Translator: Yogesh <yogesh@karnatakaeducation.org.in>\n"
 "Language-Team: Kannada <https://hosted.weblate.org/projects/freedombox/"
@@ -985,7 +985,13 @@ msgstr ""
 msgid "Name of the new library"
 msgstr ""
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr ""
 
@@ -2513,7 +2519,7 @@ msgstr ""
 msgid "Wiki and Blog"
 msgstr ""
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr ""
 
@@ -3711,7 +3717,7 @@ msgid "Create Connection"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr ""
 
@@ -3758,7 +3764,7 @@ msgid "Computer"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr ""
 
@@ -3768,13 +3774,13 @@ msgstr ""
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr ""
@@ -4139,63 +4145,63 @@ msgstr ""
 msgid "Cannot show connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr ""
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr ""
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr ""
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr ""
 
diff --git a/plinth/locale/lt/LC_MESSAGES/django.po b/plinth/locale/lt/LC_MESSAGES/django.po
index 0b8052966..c8dafed1e 100644
--- a/plinth/locale/lt/LC_MESSAGES/django.po
+++ b/plinth/locale/lt/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2021-02-22 10:50+0000\n"
 "Last-Translator: Kornelijus Tvarijanavičius <kornelitvari@protonmail.com>\n"
 "Language-Team: Lithuanian <https://hosted.weblate.org/projects/freedombox/"
@@ -986,7 +986,13 @@ msgstr ""
 msgid "Name of the new library"
 msgstr ""
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr ""
 
@@ -2514,7 +2520,7 @@ msgstr ""
 msgid "Wiki and Blog"
 msgstr ""
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr ""
 
@@ -3712,7 +3718,7 @@ msgid "Create Connection"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr ""
 
@@ -3759,7 +3765,7 @@ msgid "Computer"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr ""
 
@@ -3769,13 +3775,13 @@ msgstr ""
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr ""
@@ -4140,63 +4146,63 @@ msgstr ""
 msgid "Cannot show connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr ""
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr ""
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr ""
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr ""
 
diff --git a/plinth/locale/nb/LC_MESSAGES/django.po b/plinth/locale/nb/LC_MESSAGES/django.po
index 35934ff10..c7c800676 100644
--- a/plinth/locale/nb/LC_MESSAGES/django.po
+++ b/plinth/locale/nb/LC_MESSAGES/django.po
@@ -15,7 +15,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: FreedomBox UI\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2021-12-27 05:53+0000\n"
 "Last-Translator: Petter Reinholdtsen <pere-weblate@hungry.com>\n"
 "Language-Team: Norwegian Bokmål <https://hosted.weblate.org/projects/"
@@ -1088,7 +1088,13 @@ msgstr "E-bok-bibliotek"
 msgid "Name of the new library"
 msgstr "Navn på nytt bibliotek"
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr "Det finnes allerede et bibliotek med dette navnet."
 
@@ -2926,7 +2932,7 @@ msgstr "ikiwiki"
 msgid "Wiki and Blog"
 msgstr "Wiki og Blogg"
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr "Vis og rediger wiki-programmer"
 
@@ -4293,7 +4299,7 @@ msgid "Create Connection"
 msgstr "Lage forbindelse"
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr "Slett tilkobling"
 
@@ -4340,7 +4346,7 @@ msgid "Computer"
 msgstr "Datamaskin"
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr "Endre oppkobling"
 
@@ -4352,13 +4358,13 @@ msgstr "Tilkobling"
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr "Wi-Fi-nettverk i nærheten"
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr "Legg til tilkobling"
@@ -4789,65 +4795,65 @@ msgstr "Nettverksoppkoblinger"
 msgid "Cannot show connection: Connection not found."
 msgstr "Kan ikke vise tilkobling: Tilkobling ikke funnet."
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr "Oppkoblingsinformasjon"
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr "Kan ikke redigere tilkobling: Tilkobling ikke funnet."
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr "Denne typen tilkobling er ennå ikke forstått."
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr "Aktiverte tilkobling {name}."
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr "Kunne ikke aktivere tilkobling: Tilkobling ikke funnet."
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 "Klarte ikke aktivere tilkoblingen {name}: Ingen passende enhet er "
 "tilgjengelig."
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr "Deaktivert tilkobling {name}."
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr "Kunne ikke deaktivere tilkobling: Tilkobling ikke funnet."
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr "Legger til ny generell tilkobling"
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr "Legge til ny Ethernet-tilkobling"
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr "Legge til ny PPPoE-tilkobling"
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr "Legge til ny Wi-Fi-tilkobling"
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr "Tilkobling {name} slettet."
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr "Kunne ikke slette tilkobling: Tilkobling ikke funnet."
 
diff --git a/plinth/locale/nl/LC_MESSAGES/django.po b/plinth/locale/nl/LC_MESSAGES/django.po
index 628e64b1b..5a88fa8d2 100644
--- a/plinth/locale/nl/LC_MESSAGES/django.po
+++ b/plinth/locale/nl/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2022-03-06 11:18+0000\n"
 "Last-Translator: ikmaak <info@ikmaak.nl>\n"
 "Language-Team: Dutch <https://hosted.weblate.org/projects/freedombox/"
@@ -1082,7 +1082,13 @@ msgstr "E-boek bibliotheek"
 msgid "Name of the new library"
 msgstr "Naam van de nieuwe bibliotheek"
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr "Er bestaat al een bibliotheek met deze naam."
 
@@ -1986,10 +1992,10 @@ msgid ""
 "Necessary aliases such as \"postmaster\" are automatically created pointing "
 "to the first admin user."
 msgstr ""
-"Elke gebruiker op {box_name} krijgt een email adres zoals user@"
-"mydomain.example. Zij zullen ook mail ontvangen van alle adressen die lijken "
-"op user+foo@mydomain.example. Verder kunnen ze aliassen toevoegen aan hun "
-"email adres. Noodzakelijke aliassen zoals \"postmaster\" worden automatisch "
+"Elke gebruiker op {box_name} krijgt een email adres zoals user@mydomain."
+"example. Zij zullen ook mail ontvangen van alle adressen die lijken op user"
+"+foo@mydomain.example. Verder kunnen ze aliassen toevoegen aan hun email "
+"adres. Noodzakelijke aliassen zoals \"postmaster\" worden automatisch "
 "aangemaakt en wijzen naar de eerste admin gebruiker."
 
 #: plinth/modules/email/__init__.py:37
@@ -2872,7 +2878,7 @@ msgstr "ikiwiki"
 msgid "Wiki and Blog"
 msgstr "Wiki en Blog"
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr "Bekijken en bewerken van wiki toepassingen"
 
@@ -4296,7 +4302,7 @@ msgid "Create Connection"
 msgstr "Maak Verbinding"
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr "Verwijder verbinding"
 
@@ -4343,7 +4349,7 @@ msgid "Computer"
 msgstr "Computer"
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr "Wijzig verbinding"
 
@@ -4353,13 +4359,13 @@ msgstr "Verbindingen"
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr "Wi-Fi Netwerken dichtbij"
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr "Verbinding toevoegen"
@@ -4765,63 +4771,63 @@ msgstr "Netwerkverbindingen"
 msgid "Cannot show connection: Connection not found."
 msgstr "Kan verbinding niet weergeven: Verbinding niet gevonden."
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr "Verbindingsgegevens"
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr "Kan verbinding niet wijzigen: Verbinding niet gevonden."
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr "Deze verbindingsmethode is (nog) niet bekend."
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr "Geactiveerde verbinding {name}."
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr "Kan verbinding niet inschakelen: Verbinding niet gevonden."
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr "Kan verbinding {name} niet inschakelen: Verbinding niet gevonden."
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr "Verbinding {name} uitgeschakeld."
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr "Kan verbinding niet uitschakelen: Verbinding niet gevonden."
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr "Toevoegen nieuwe Verbinding"
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr "Toevoegen nieuwe Ethernetverbinding"
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr "Toevoegen nieuwe PPPoE verbinding"
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr "Toevoegen nieuwe W-Fi verbinding"
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr "Verbinding {name} verwijderd."
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr "Kan verbinding niet verwijderen: Verbinding niet gevonden."
 
diff --git a/plinth/locale/pl/LC_MESSAGES/django.po b/plinth/locale/pl/LC_MESSAGES/django.po
index a4deb2397..31f34ce88 100644
--- a/plinth/locale/pl/LC_MESSAGES/django.po
+++ b/plinth/locale/pl/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2021-03-03 16:50+0000\n"
 "Last-Translator: Karol Werner <karol@ppkt.eu>\n"
 "Language-Team: Polish <https://hosted.weblate.org/projects/freedombox/"
@@ -1073,7 +1073,13 @@ msgstr ""
 msgid "Name of the new library"
 msgstr "Utwórz nowe repozytorium"
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 #, fuzzy
 #| msgid "Remote backup repository already exists."
 msgid "A library with this name already exists."
@@ -2808,7 +2814,7 @@ msgstr "ikiwiki"
 msgid "Wiki and Blog"
 msgstr "Wiki i blog"
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 #, fuzzy
 #| msgid "Services and Applications"
 msgid "View and edit wiki applications"
@@ -4046,7 +4052,7 @@ msgid "Create Connection"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr ""
 
@@ -4093,7 +4099,7 @@ msgid "Computer"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr ""
 
@@ -4105,13 +4111,13 @@ msgstr "Odmowa dostępu"
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr ""
@@ -4496,63 +4502,63 @@ msgstr ""
 msgid "Cannot show connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr ""
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr ""
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr ""
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr ""
 
diff --git a/plinth/locale/pt/LC_MESSAGES/django.po b/plinth/locale/pt/LC_MESSAGES/django.po
index 59a10bdab..29f43ae20 100644
--- a/plinth/locale/pt/LC_MESSAGES/django.po
+++ b/plinth/locale/pt/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2021-05-08 22:33+0000\n"
 "Last-Translator: ssantos <ssantos@web.de>\n"
 "Language-Team: Portuguese <https://hosted.weblate.org/projects/freedombox/"
@@ -1058,7 +1058,13 @@ msgstr ""
 msgid "Name of the new library"
 msgstr "Criar novo repositório"
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr ""
 
@@ -2683,7 +2689,7 @@ msgstr "Ativar tempo da rede"
 msgid "Wiki and Blog"
 msgstr ""
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 #, fuzzy
 #| msgid "Services and Applications"
 msgid "View and edit wiki applications"
@@ -3917,7 +3923,7 @@ msgid "Create Connection"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr ""
 
@@ -3964,7 +3970,7 @@ msgid "Computer"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr ""
 
@@ -3976,13 +3982,13 @@ msgstr "Conexão recusada"
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr ""
@@ -4373,63 +4379,63 @@ msgstr ""
 msgid "Cannot show connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr ""
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr ""
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr ""
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr ""
 
diff --git a/plinth/locale/ru/LC_MESSAGES/django.po b/plinth/locale/ru/LC_MESSAGES/django.po
index 04cade518..5700ba7b7 100644
--- a/plinth/locale/ru/LC_MESSAGES/django.po
+++ b/plinth/locale/ru/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2022-03-20 14:17+0000\n"
 "Last-Translator: Nikita Epifanov <nikgreens@protonmail.com>\n"
 "Language-Team: Russian <https://hosted.weblate.org/projects/freedombox/"
@@ -1080,7 +1080,13 @@ msgstr "Электронная библиотека"
 msgid "Name of the new library"
 msgstr "Название новой библиотеки"
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr "Библиотека с таким названием уже существует."
 
@@ -1976,12 +1982,12 @@ msgid ""
 "Necessary aliases such as \"postmaster\" are automatically created pointing "
 "to the first admin user."
 msgstr ""
-"Каждый пользователь {box_name} получает почтовый адрес наподобие \"user"
-"@mydomain.example\". Также он может получать почту с адресов типа \"user"
-"+foo@mydomain.example\". Кроме того, они могут выполнять переадресацию к "
-"почтовым адресам. Нужные адреса для переадресации, такие как \"postmaster\", "
-"создаются автоматически и переадресуют на адрес администратора, созданный "
-"первым."
+"Каждый пользователь {box_name} получает почтовый адрес наподобие "
+"\"user@mydomain.example\". Также он может получать почту с адресов типа "
+"\"user+foo@mydomain.example\". Кроме того, они могут выполнять переадресацию "
+"к почтовым адресам. Нужные адреса для переадресации, такие как \"postmaster"
+"\", создаются автоматически и переадресуют на адрес администратора, "
+"созданный первым."
 
 #: plinth/modules/email/__init__.py:37
 msgid ""
@@ -2859,7 +2865,7 @@ msgstr "ikiwiki"
 msgid "Wiki and Blog"
 msgstr "Вики и Блог"
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr "Просмотр и редактирование приложений Wiki"
 
@@ -4273,7 +4279,7 @@ msgid "Create Connection"
 msgstr "Создание подключения"
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr "Удаление подключения"
 
@@ -4320,7 +4326,7 @@ msgid "Computer"
 msgstr "Компьютер"
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr "Редактирование подключения"
 
@@ -4330,13 +4336,13 @@ msgstr "Подключения"
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr "Соседние сети Wi-Fi"
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr "Добавить подключение"
@@ -4744,63 +4750,63 @@ msgstr "Сетевые подключения"
 msgid "Cannot show connection: Connection not found."
 msgstr "Не удается показать подключение: соединение не найдено."
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr "Сведения о подключении"
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr "Нельзя редактировать подключение: подключение не найдено."
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr "Этот тип подключения еще не понятен."
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr "Установленное подключение {name}."
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr "Невозможно установить подключение: Подключение не найдено."
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr "Не удалось установить подключение {name}: Нет подходящего устройства."
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr "Разорвано подключение {name}."
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr "Не удалось разорвать подключение: соединение не найдено."
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr "Добавление нового общего подключения"
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr "Добавление нового подключения Ethernet"
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr "Добавление нового подключения PPPoE"
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr "Добавление нового подключения Wi-Fi"
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr "Подключение {name} удалено."
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr "Не удалось удалить подключение: соединение не найдено."
 
diff --git a/plinth/locale/si/LC_MESSAGES/django.po b/plinth/locale/si/LC_MESSAGES/django.po
index 37464b888..529e2cea7 100644
--- a/plinth/locale/si/LC_MESSAGES/django.po
+++ b/plinth/locale/si/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2021-04-27 13:32+0000\n"
 "Last-Translator: HelaBasa <R45XvezA@protonmail.ch>\n"
 "Language-Team: Sinhala <https://hosted.weblate.org/projects/freedombox/"
@@ -985,7 +985,13 @@ msgstr ""
 msgid "Name of the new library"
 msgstr ""
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr ""
 
@@ -2513,7 +2519,7 @@ msgstr ""
 msgid "Wiki and Blog"
 msgstr ""
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr ""
 
@@ -3711,7 +3717,7 @@ msgid "Create Connection"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr ""
 
@@ -3758,7 +3764,7 @@ msgid "Computer"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr ""
 
@@ -3768,13 +3774,13 @@ msgstr ""
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr ""
@@ -4139,63 +4145,63 @@ msgstr ""
 msgid "Cannot show connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr ""
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr ""
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr ""
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr ""
 
diff --git a/plinth/locale/sl/LC_MESSAGES/django.po b/plinth/locale/sl/LC_MESSAGES/django.po
index 952df5fdb..7fc1db56d 100644
--- a/plinth/locale/sl/LC_MESSAGES/django.po
+++ b/plinth/locale/sl/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2021-01-18 12:32+0000\n"
 "Last-Translator: ikmaak <info@ikmaak.nl>\n"
 "Language-Team: Slovenian <https://hosted.weblate.org/projects/freedombox/"
@@ -1101,7 +1101,13 @@ msgstr ""
 msgid "Name of the new library"
 msgstr "Ustvari novo skladišče"
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 #, fuzzy
 #| msgid "Create remote backup repository"
 msgid "A library with this name already exists."
@@ -2706,7 +2712,7 @@ msgstr ""
 msgid "Wiki and Blog"
 msgstr ""
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr ""
 
@@ -3911,7 +3917,7 @@ msgid "Create Connection"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr ""
 
@@ -3958,7 +3964,7 @@ msgid "Computer"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr ""
 
@@ -3970,13 +3976,13 @@ msgstr "Povezava je zavrnjena"
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr ""
@@ -4351,63 +4357,63 @@ msgstr ""
 msgid "Cannot show connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr ""
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr ""
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr ""
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr ""
 
diff --git a/plinth/locale/sq/LC_MESSAGES/django.po b/plinth/locale/sq/LC_MESSAGES/django.po
index ab9210c9c..6b980bb8c 100644
--- a/plinth/locale/sq/LC_MESSAGES/django.po
+++ b/plinth/locale/sq/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2022-02-06 23:23+0000\n"
 "Last-Translator: Besnik Bleta <besnik@programeshqip.org>\n"
 "Language-Team: Albanian <https://hosted.weblate.org/projects/freedombox/"
@@ -1078,7 +1078,13 @@ msgstr "Bibliotekë E-librash"
 msgid "Name of the new library"
 msgstr "Emër i bibliotekës së re"
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr "Ka tashmë një bibliotekë me atë emër."
 
@@ -2890,7 +2896,7 @@ msgstr "ikiwiki"
 msgid "Wiki and Blog"
 msgstr "Wiki dhe Blog"
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr "Shihni dhe përpunoni aplikacione wiki"
 
@@ -4314,7 +4320,7 @@ msgid "Create Connection"
 msgstr "Krijoni Lidhje"
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr "Fshije Lidhjen"
 
@@ -4361,7 +4367,7 @@ msgid "Computer"
 msgstr "Kompjuter"
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr "Përpunoni Lidhje"
 
@@ -4371,13 +4377,13 @@ msgstr "Lidhje"
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr "Rrjete Wi-Fi Atypari"
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr "Shtoni Lidhje"
@@ -4783,64 +4789,64 @@ msgstr "Lidhje Rrjeti"
 msgid "Cannot show connection: Connection not found."
 msgstr "S’shfaqet dot lidhje: S’u gjet lidhje."
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr "Hollësi Lidhjeje"
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr "S’përpunohet dot lidhje: S’u gjet lidhje."
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr "Ky lloj lidhjesh nuk kuptohet ende."
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr "U aktivizua lidhja {name}."
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr "S’u arrit të aktivizohet lidhje: S’u gjet lidhje."
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 "S’u arrit të aktivizohet lidhja {name}: S’u gjet pajisje e përshtatshme."
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr "U çaktivizua lidhja {name}."
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr "Dështoi çaktivizimi i lidhjes: S’u gjet lidhje."
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr "Po Shtohet Lidhje e Re Elementare"
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr "Po Shtohet Lidhje e Re Ethernet"
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr "Po Shtohet Lidhje e Re PPPoE"
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr "Po Shtohet Lidhje e Re Wi-Fi"
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr "Lidhja {name} u fshi."
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr "S’u arrit të fshihet lidhje: S’u gjet lidhje."
 
diff --git a/plinth/locale/sr/LC_MESSAGES/django.po b/plinth/locale/sr/LC_MESSAGES/django.po
index bb50ee86e..12c966b6b 100644
--- a/plinth/locale/sr/LC_MESSAGES/django.po
+++ b/plinth/locale/sr/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2021-01-18 12:32+0000\n"
 "Last-Translator: ikmaak <info@ikmaak.nl>\n"
 "Language-Team: Serbian <https://hosted.weblate.org/projects/freedombox/"
@@ -1054,7 +1054,13 @@ msgstr ""
 msgid "Name of the new library"
 msgstr ""
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr ""
 
@@ -2604,7 +2610,7 @@ msgstr ""
 msgid "Wiki and Blog"
 msgstr ""
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr ""
 
@@ -3806,7 +3812,7 @@ msgid "Create Connection"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr ""
 
@@ -3853,7 +3859,7 @@ msgid "Computer"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr ""
 
@@ -3863,13 +3869,13 @@ msgstr ""
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr ""
@@ -4242,63 +4248,63 @@ msgstr ""
 msgid "Cannot show connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr ""
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr ""
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr ""
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr ""
 
diff --git a/plinth/locale/sv/LC_MESSAGES/django.po b/plinth/locale/sv/LC_MESSAGES/django.po
index cc464768d..239613faa 100644
--- a/plinth/locale/sv/LC_MESSAGES/django.po
+++ b/plinth/locale/sv/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2022-02-17 16:58+0000\n"
 "Last-Translator: Michael Breidenbach <leahc@tutanota.com>\n"
 "Language-Team: Swedish <https://hosted.weblate.org/projects/freedombox/"
@@ -1077,7 +1077,13 @@ msgstr "E-bok Bibliotek"
 msgid "Name of the new library"
 msgstr "Det nya bibliotekets namn"
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr "Ett bibliotek med detta namn finns redan."
 
@@ -2866,7 +2872,7 @@ msgstr "Ikiwiki"
 msgid "Wiki and Blog"
 msgstr "Wiki och Blogg"
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr "Visa och redigera wiki-applikationer"
 
@@ -4273,7 +4279,7 @@ msgid "Create Connection"
 msgstr "Skapa anslutning"
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr "Ta Bort Anslutning"
 
@@ -4320,7 +4326,7 @@ msgid "Computer"
 msgstr "Dator"
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr "Redigera Anslutning"
 
@@ -4330,13 +4336,13 @@ msgstr "Anslutningar"
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr "Wi-Fi-nätverk i närheten"
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr "Lägg till Anslutning"
@@ -4740,65 +4746,65 @@ msgstr "Nätverksanslutningar"
 msgid "Cannot show connection: Connection not found."
 msgstr "Kan inte visa anslutning: Ingen anslutning hittades."
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr "Anslutningsinformation"
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr "Kan inte redigera anslutning: Ingen anslutning hittades."
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr "Denna typ av anslutning är inte förstådd ännu."
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr "Aktiverad anslutning {name}."
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr "Det gick inte att aktivera anslutning: Ingen anslutning hittades."
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 "Det gick inte att aktivera anslutningen {name}: Ingen lämplig enhet är "
 "tillgänglig."
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr "Inaktiverade anslutning {name}."
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr "Kunde inte de-aktivera anslutning: Anslutning hittades inte."
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr "Lägga till ny generiska anslutning"
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr "Lägg Till Ny Ethernet-Anslutning"
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr "Lägg Till Ny PPPoE-Anslutning"
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr "Lägg Till Ny Wi-Fi-Anslutning"
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr "Anslutning {name} borttagen."
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr "Det gick inte att ta bort anslutning: Anslutning hittades inte."
 
diff --git a/plinth/locale/ta/LC_MESSAGES/django.po b/plinth/locale/ta/LC_MESSAGES/django.po
index d0da3ffdc..b802f37ca 100644
--- a/plinth/locale/ta/LC_MESSAGES/django.po
+++ b/plinth/locale/ta/LC_MESSAGES/django.po
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -984,7 +984,13 @@ msgstr ""
 msgid "Name of the new library"
 msgstr ""
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr ""
 
@@ -2512,7 +2518,7 @@ msgstr ""
 msgid "Wiki and Blog"
 msgstr ""
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr ""
 
@@ -3710,7 +3716,7 @@ msgid "Create Connection"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr ""
 
@@ -3757,7 +3763,7 @@ msgid "Computer"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr ""
 
@@ -3767,13 +3773,13 @@ msgstr ""
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr ""
@@ -4138,63 +4144,63 @@ msgstr ""
 msgid "Cannot show connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr ""
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr ""
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr ""
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr ""
 
diff --git a/plinth/locale/te/LC_MESSAGES/django.po b/plinth/locale/te/LC_MESSAGES/django.po
index dda1df8e4..20d46014d 100644
--- a/plinth/locale/te/LC_MESSAGES/django.po
+++ b/plinth/locale/te/LC_MESSAGES/django.po
@@ -9,7 +9,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: FreedomBox UI\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2022-03-02 12:27+0000\n"
 "Last-Translator: James Valleroy <jvalleroy@mailbox.org>\n"
 "Language-Team: Telugu <https://hosted.weblate.org/projects/freedombox/"
@@ -1049,7 +1049,13 @@ msgstr "ఇ-బుక్ లైబ్రరీ"
 msgid "Name of the new library"
 msgstr "కొత్త గ్రంధాలయం పేరు"
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr "ఈ పేరుతో గ్రంధాలయం ఇప్పటికే ఉంది."
 
@@ -2771,7 +2777,7 @@ msgstr "ఇకివికీ"
 msgid "Wiki and Blog"
 msgstr "వికీ మరియు బ్లాగ్"
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr "వికీ అనువర్తనాలను చూడండి మరియు మార్చండి"
 
@@ -4126,7 +4132,7 @@ msgid "Create Connection"
 msgstr "అనుసంధానం సృష్టించు"
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr "అనుసంధానం తొలగించు"
 
@@ -4173,7 +4179,7 @@ msgid "Computer"
 msgstr "కంప్యూటర్"
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr "అనుసంధానాన్ని సవరించండి"
 
@@ -4183,13 +4189,13 @@ msgstr "అనుసంధానం"
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr "సమీప వై-ఫై నెట్వర్కులు"
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr "అనుసంధానాన్ని జతచేయండి"
@@ -4583,63 +4589,63 @@ msgstr "నెట్వర్క్ అనుసంధానాలు"
 msgid "Cannot show connection: Connection not found."
 msgstr "అనుసంధానం చూపించలేము: అనుసంధానం దొరకలేదు."
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr "అనుసంధాన సమాచారం"
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr "దొరకలేదు అనుసంధానం: అనుసంధానని సవరించడం సాధ్యపడదు."
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr "ఇటువంటి అనుసంధాన రకం ఇంకా అర్థంకాలేదు."
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr "{name} అనుసంధానం ఉత్తేజించబడింది."
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr "అనుసంధానాన్ని ఉత్తేజించుటలో విఫలమైంది:  అనుసంధానం దొరకలేదు."
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr "{name} అనుసంధానాన్ని ఉత్తేజించుటలో విఫలమైంది: సరైన పరికరం అందుబాటులో లేదు."
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr "{name} అనుసంధానం క్రియారహితం చేయబడింది."
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr "అనుసంధానం క్రియారహితం విఫలమైంది: అనుసంధానం దొరకలేదు."
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr "కొత్త జెనరిక్ కనెక్షన్‌ని జోడిస్తోంది"
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr "కొత్త ఈథర్నెట్ అనుసంధానాన్ని కలుపుతోంది"
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr "కొత్త PPPoE అనుసంధానాన్ని కలుపుతోంది"
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr "కొత్త వై-ఫై అనుసంధానాన్ని కలుపుతోంది"
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr "{name} అనుసంధానం తొలగించబడింది."
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr "అనుసంధానం తొలగించడం విఫలమైంది: అనుసంధానం దొరకలేదు."
 
diff --git a/plinth/locale/tr/LC_MESSAGES/django.po b/plinth/locale/tr/LC_MESSAGES/django.po
index 02e6d0db8..49efc971d 100644
--- a/plinth/locale/tr/LC_MESSAGES/django.po
+++ b/plinth/locale/tr/LC_MESSAGES/django.po
@@ -6,7 +6,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: \n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2022-03-04 12:58+0000\n"
 "Last-Translator: Burak Yavuz <hitowerdigit@hotmail.com>\n"
 "Language-Team: Turkish <https://hosted.weblate.org/projects/freedombox/"
@@ -1069,7 +1069,13 @@ msgstr "E-kitap Kütüphanesi"
 msgid "Name of the new library"
 msgstr "Yeni kütüphanenin adı"
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr "Bu ada sahip bir kütüphane zaten var."
 
@@ -2852,7 +2858,7 @@ msgstr "ikiwiki"
 msgid "Wiki and Blog"
 msgstr "Viki ve Blog"
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr "Viki uygulamalarını görüntüle ve düzenle"
 
@@ -4270,7 +4276,7 @@ msgid "Create Connection"
 msgstr "Bağlantı Oluştur"
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr "Bağlantıyı Sil"
 
@@ -4317,7 +4323,7 @@ msgid "Computer"
 msgstr "Bilgisayar"
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr "Bağlantıyı Düzenle"
 
@@ -4327,13 +4333,13 @@ msgstr "Bağlantılar"
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr "Yakındaki Kablosuz (Wi-Fi) Ağları"
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr "Bağlantı Ekle"
@@ -4736,64 +4742,64 @@ msgstr "Ağ Bağlantıları"
 msgid "Cannot show connection: Connection not found."
 msgstr "Bağlantı gösterilemiyor: Bağlantı bulunamadı."
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr "Bağlantı Bilgileri"
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr "Bağlantı düzenlenemiyor: Bağlantı bulunamadı."
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr "Bu tür bir bağlantı henüz anlaşılmamaktadır."
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr "{name} bağlantısı etkinleştirildi."
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr "Bağlantıyı etkinleştirme başarısız oldu: Bağlantı bulunamadı."
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 "{name} bağlantısını etkinleştirme başarısız oldu: Mevcut uygun bir cihaz yok."
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr "{name} bağlantısı devre dışı bırakıldı."
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr "Bağlantıyı devre dışı bırakma başarısız oldu: Bağlantı bulunamadı."
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr "Yeni Genel Bağlantı Ekleme"
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr "Yeni Ethernet Bağlantısı Ekleme"
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr "Yeni PPPoE Bağlantısı Ekleme"
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr "Yeni Kablosuz (Wi-Fi) Bağlantısı Ekleme"
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr "{name} bağlantısı silindi."
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr "Bağlantının silinmesi başarısız oldu: Bağlantı bulunamadı."
 
diff --git a/plinth/locale/uk/LC_MESSAGES/django.po b/plinth/locale/uk/LC_MESSAGES/django.po
index 665678b3b..d3b35de7c 100644
--- a/plinth/locale/uk/LC_MESSAGES/django.po
+++ b/plinth/locale/uk/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2022-02-16 20:57+0000\n"
 "Last-Translator: Andrij Mizyk <andmizyk@gmail.com>\n"
 "Language-Team: Ukrainian <https://hosted.weblate.org/projects/freedombox/"
@@ -1074,7 +1074,13 @@ msgstr "Бібліотека ел. книжок"
 msgid "Name of the new library"
 msgstr "Назва нової бібліотеки"
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr "Бібліотека з такою назвою вже існує."
 
@@ -2746,7 +2752,7 @@ msgstr "ikiwiki"
 msgid "Wiki and Blog"
 msgstr "Вікі та блоґ"
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr "Перегляд і редагування застосунків вікі"
 
@@ -4019,7 +4025,7 @@ msgid "Create Connection"
 msgstr "Створити зʼєднання"
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr "Видалити зʼєднання"
 
@@ -4066,7 +4072,7 @@ msgid "Computer"
 msgstr "Компʼютер"
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr "Змінити зʼєднання"
 
@@ -4076,13 +4082,13 @@ msgstr "Зʼєднання"
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr "Мережі Wi-Fi поблизу"
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr "Додати зʼєднання"
@@ -4475,64 +4481,64 @@ msgstr "Мережеві зʼєднання"
 msgid "Cannot show connection: Connection not found."
 msgstr "Не можливо показати зʼєднання: Зʼєднання не знайдено."
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr "Інформація про зʼєднання"
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr "Не можливо змінити зʼєднання: Зʼєднання не знайдено."
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr ""
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr "Активовано зʼєднання {name}."
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr "Не вдалося активувати зʼєднання: Зʼєднання не знайдено."
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 "Не вдалося активувати зʼєднання {name}: Не доступний підходящий пристрій."
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr "Деактивовано зʼєднання {name}."
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr "Не вдалося деактивувати зʼєднання: Зʼєднання не знайдено."
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr "Додавання нового зʼєднання Ethernet"
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr "Додавання нового зʼєднання PPPoE"
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr "Додавання нового зʼєднання Wi-Fi"
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr "Зʼєднання {name} видалено."
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr "Не вдалося видалити зʼєднання: Зʼєднання не знайдено."
 
diff --git a/plinth/locale/vi/LC_MESSAGES/django.po b/plinth/locale/vi/LC_MESSAGES/django.po
index 04afe1588..79ac4b6e4 100644
--- a/plinth/locale/vi/LC_MESSAGES/django.po
+++ b/plinth/locale/vi/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2021-07-28 08:34+0000\n"
 "Last-Translator: bruh <quangtrung02hn16@gmail.com>\n"
 "Language-Team: Vietnamese <https://hosted.weblate.org/projects/freedombox/"
@@ -1085,7 +1085,13 @@ msgstr "Thư viện sách điện tử"
 msgid "Name of the new library"
 msgstr "Tên của thư viện mới"
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr "Một thư viện có tên này đã tồn tại."
 
@@ -2735,7 +2741,7 @@ msgstr ""
 msgid "Wiki and Blog"
 msgstr ""
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr ""
 
@@ -3933,7 +3939,7 @@ msgid "Create Connection"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr ""
 
@@ -3980,7 +3986,7 @@ msgid "Computer"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr ""
 
@@ -3990,13 +3996,13 @@ msgstr ""
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr ""
@@ -4361,63 +4367,63 @@ msgstr ""
 msgid "Cannot show connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr ""
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr ""
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr ""
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr ""
 
diff --git a/plinth/locale/zh_Hans/LC_MESSAGES/django.po b/plinth/locale/zh_Hans/LC_MESSAGES/django.po
index 19c6031af..da234de52 100644
--- a/plinth/locale/zh_Hans/LC_MESSAGES/django.po
+++ b/plinth/locale/zh_Hans/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: Plinth\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2022-03-28 05:11+0000\n"
 "Last-Translator: Eric <alchemillatruth@purelymail.com>\n"
 "Language-Team: Chinese (Simplified) <https://hosted.weblate.org/projects/"
@@ -1030,7 +1030,13 @@ msgstr "电子书库"
 msgid "Name of the new library"
 msgstr "新库名称"
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr "已存在同名的库。"
 
@@ -2661,7 +2667,7 @@ msgstr "ikiwiki"
 msgid "Wiki and Blog"
 msgstr "Wiki 和博客"
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr "查看和编辑 wiki 应用程序"
 
@@ -3891,7 +3897,7 @@ msgid "Create Connection"
 msgstr "创建连接"
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr "删除连接"
 
@@ -3938,7 +3944,7 @@ msgid "Computer"
 msgstr "计算机"
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr "编辑连接"
 
@@ -3948,13 +3954,13 @@ msgstr "连接"
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr "附近的无线网络"
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr "添加连接"
@@ -4319,63 +4325,63 @@ msgstr "网络连接"
 msgid "Cannot show connection: Connection not found."
 msgstr "不能显示连接: 找不到连接。"
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr "连接信息"
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr "不能编辑连接: 找不到连接。"
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr "这种类型的连接尚没有引入。"
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr "激活的连接 {name}。"
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr "未能激活连接: 找不到连接。"
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr "未能激活连接 {name}: 没有合适的设备是可用。"
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr "停用的连接 {name}。"
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr "无法取消激活连接: 找不到连接。"
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr "添加新的常规连接"
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr "添加新的以太网连接"
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr "添加新的 PPPoE 连接"
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr "添加新的 Wi-Fi 连接"
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr "连接 {name} 已删除。"
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr "删除连接失败: 找不到连接。"
 
diff --git a/plinth/locale/zh_Hant/LC_MESSAGES/django.po b/plinth/locale/zh_Hant/LC_MESSAGES/django.po
index d354d7b60..b48cf9491 100644
--- a/plinth/locale/zh_Hant/LC_MESSAGES/django.po
+++ b/plinth/locale/zh_Hant/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-02 08:06-0500\n"
+"POT-Creation-Date: 2022-03-28 20:05-0400\n"
 "PO-Revision-Date: 2021-12-23 12:50+0000\n"
 "Last-Translator: pesder <j_h_liau@yahoo.com.tw>\n"
 "Language-Team: Chinese (Traditional) <https://hosted.weblate.org/projects/"
@@ -1038,7 +1038,13 @@ msgstr "電子書圖書館"
 msgid "Name of the new library"
 msgstr "新圖書館名稱"
 
-#: plinth/modules/calibre/forms.py:27
+#: plinth/modules/calibre/forms.py:19
+msgid ""
+"Only letters of the English alphabet and numbers, without spaces or special "
+"characters. Example: My_Library_2000"
+msgstr ""
+
+#: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."
 msgstr "已存在同樣名稱的圖書館。"
 
@@ -2614,7 +2620,7 @@ msgstr ""
 msgid "Wiki and Blog"
 msgstr ""
 
-#: plinth/modules/ikiwiki/__init__.py:75
+#: plinth/modules/ikiwiki/__init__.py:77
 msgid "View and edit wiki applications"
 msgstr ""
 
@@ -3812,7 +3818,7 @@ msgid "Create Connection"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_delete.html:11
-#: plinth/modules/networks/views.py:516
+#: plinth/modules/networks/views.py:517
 msgid "Delete Connection"
 msgstr ""
 
@@ -3859,7 +3865,7 @@ msgid "Computer"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_edit.html:20
-#: plinth/modules/networks/views.py:236 plinth/modules/networks/views.py:320
+#: plinth/modules/networks/views.py:237 plinth/modules/networks/views.py:321
 msgid "Edit Connection"
 msgstr ""
 
@@ -3869,13 +3875,13 @@ msgstr ""
 
 #: plinth/modules/networks/templates/connections_list.html:12
 #: plinth/modules/networks/templates/connections_list.html:14
-#: plinth/modules/networks/views.py:369
+#: plinth/modules/networks/views.py:370
 msgid "Nearby Wi-Fi Networks"
 msgstr ""
 
 #: plinth/modules/networks/templates/connections_list.html:17
 #: plinth/modules/networks/templates/connections_list.html:19
-#: plinth/modules/networks/views.py:393
+#: plinth/modules/networks/views.py:394
 #: plinth/modules/wireguard/templates/wireguard_add_server.html:19
 msgid "Add Connection"
 msgstr ""
@@ -4240,63 +4246,63 @@ msgstr ""
 msgid "Cannot show connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:194
+#: plinth/modules/networks/views.py:195
 msgid "Connection Information"
 msgstr ""
 
-#: plinth/modules/networks/views.py:208
+#: plinth/modules/networks/views.py:209
 msgid "Cannot edit connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:214
+#: plinth/modules/networks/views.py:215
 msgid "This type of connection is not yet understood."
 msgstr ""
 
-#: plinth/modules/networks/views.py:332
+#: plinth/modules/networks/views.py:333
 #, python-brace-format
 msgid "Activated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:336
+#: plinth/modules/networks/views.py:337
 msgid "Failed to activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:342
+#: plinth/modules/networks/views.py:343
 #, python-brace-format
 msgid "Failed to activate connection {name}: No suitable device is available."
 msgstr ""
 
-#: plinth/modules/networks/views.py:355
+#: plinth/modules/networks/views.py:356
 #, python-brace-format
 msgid "Deactivated connection {name}."
 msgstr ""
 
-#: plinth/modules/networks/views.py:359
+#: plinth/modules/networks/views.py:360
 msgid "Failed to de-activate connection: Connection not found."
 msgstr ""
 
-#: plinth/modules/networks/views.py:411
+#: plinth/modules/networks/views.py:412
 msgid "Adding New Generic Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:429
+#: plinth/modules/networks/views.py:430
 msgid "Adding New Ethernet Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:447
+#: plinth/modules/networks/views.py:448
 msgid "Adding New PPPoE Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:482
+#: plinth/modules/networks/views.py:483
 msgid "Adding New Wi-Fi Connection"
 msgstr ""
 
-#: plinth/modules/networks/views.py:497
+#: plinth/modules/networks/views.py:498
 #, python-brace-format
 msgid "Connection {name} deleted."
 msgstr ""
 
-#: plinth/modules/networks/views.py:501 plinth/modules/networks/views.py:511
+#: plinth/modules/networks/views.py:502 plinth/modules/networks/views.py:512
 msgid "Failed to delete connection: Connection not found."
 msgstr ""