When using D&D and kontext, a different language appears instead of German.
It is the latest version 13.20.1.
Reloaded due to missing settings.
The old 13.20.1 did this too.
Switching to another language and back does not help.
I can't reproduce that so far, using the newer 13.20.1 beta.
Is the language the menu appears in one you switch to previously, maybe when testing something?
If the commands in the menu are modified, it might mean the language-change process leaves them as-is when switching languages instead of replacing their labels. That could cause them to get stuck in the language they were in when the edits were made. Would be unusual, though.
The German defaults should look like this, on the Alle Dateien und Ordner (All Files and Folders) file type:
That's a wild mix of German and Turkish (?) you have there 
I installed a stock version of 13.20.1 and toggled the languages back and forth a bit, but I never got a menu in the wrong language. Will the menus be okay if you go back to 13.20?
Restore System to last backup.
now it's Italian
The language change is only available in D&D / Context.
Everything else is in German (default settings / toolbars, etc.).
No, returning to 13.20 did not change anything.
Even at 13.19, when tested, it is now present!
I'll try the backup before that at the weekend.
Windows 11 25H2 Build 26200.7309 the cause?
Windows 11 25H2 Build 26200.7462 has been available since yesterday.
Restore System to last worked backup.
DOpus 13.19 with Windows 11 (25H2 Build 26200.7171)
Update to 13.20 (.1) = everything worked
DOpus 13.20 (.1) with Windows 11 (25H2 Build 26200.7309) = wrong language
The subsequent patch from 26200.7296 to 26200.7309
seems to have changed something?
DOpus 13.19 with Windows 11 (25H2 Build 26200.7462)
Update to 13.20 (.1) = everything worked