Originally Posted by Sil_liS
I'm not sure how it happened, but after replying to a post I found myself in the same position. Strangely enough the language under Sprache der Benutzeroberfläche was set to English. I changed nothing but saved anyway and the menu got back to English.
At the bottom left side of the forum you can change the language from English to Deutsch and back. Sometimes this gets bumped on my browser and I have to change it back.