Hello again iman,
I believe that the issue comes from our last update.
More specifically, some of our language files were not updated in the latest release. This is impacting Core, Pro, Community and Community Tickets.
The workaround for now will be to update the po file from the pot file
This can be done in Poedit using Catalog > Update from pot file
The good news is that this should be fixed in the maintenance release scheduled later this week.
Let me know if that helps.
Have a great day!
Geoff B.