Since the official language of Whonix and this discussion forum is English there is no point of making multiple selections IMO. Changing the language changes only part of the inferface anyway (General Discussion, Website Bugs, Offtopic stay).
For the same reason I recommend getting rid of German text in Whonix workstation welcome screen. You state that understanding of English is required.
You might want to update the GitHub Whonix and adrelanos with the new logo.
You can also remove the “Personal Message” tab below since they are disabled and then the page would fit nicely on the screen, no scrolling. In my case.
Other than that, I like it.