diff --git a/plinth/locale/cs/LC_MESSAGES/django.po b/plinth/locale/cs/LC_MESSAGES/django.po
index 2c4790fb0..326b6b31e 100644
--- a/plinth/locale/cs/LC_MESSAGES/django.po
+++ b/plinth/locale/cs/LC_MESSAGES/django.po
@@ -8,7 +8,7 @@ msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
 "POT-Creation-Date: 2022-03-28 20:05-0400\n"
-"PO-Revision-Date: 2022-03-04 12:58+0000\n"
+"PO-Revision-Date: 2022-03-31 09:12+0000\n"
 "Last-Translator: Jiří Podhorecký <j.podhorecky@volny.cz>\n"
 "Language-Team: Czech <https://hosted.weblate.org/projects/freedombox/"
 "freedombox/cs/>\n"
@@ -17,7 +17,7 @@ msgstr ""
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
 "Plural-Forms: nplurals=3; plural=(n==1) ? 0 : (n>=2 && n<=4) ? 1 : 2;\n"
-"X-Generator: Weblate 4.11.1-dev\n"
+"X-Generator: Weblate 4.12-dev\n"
 
 #: doc/dev/_templates/layout.html:11
 msgid "Page source"
@@ -1071,6 +1071,8 @@ msgid ""
 "Only letters of the English alphabet and numbers, without spaces or special "
 "characters. Example: My_Library_2000"
 msgstr ""
+"Pouze písmena anglické abecedy a číslice, bez mezer a speciálních znaků. "
+"Příklad: My_Library_2000"
 
 #: plinth/modules/calibre/forms.py:30
 msgid "A library with this name already exists."