The algorithm clearly says that you're German. Maybe you should just embrace it.

Listening to metal gets a lot of recommendations for me in languages I don't understand much of. You would think Spotify would have a way to not change languages between songs at least.

Metal fans who listen to things beyond the mainstream hits tend to listen to a lot of music in languages they don't speak due to how much of the best metal out there isn't in English. If you listen to a lot of bands whose fans listen to music in other languages then I'd expect you to get a lot of recommendations in other languages.

I understand why it happens, but it doesn't mean I want it to happen. Unfortunately, this is a case where a recommender system runs into issues. Outside of these songs, I likely overlap a lot with the people who are okay with non English recommendations.

... is it really that odd that you get suggestions for music from other places in other languages?

Look I’m sorry but you love German music. The sooner you accept that the sooner we can all move on.