Hoi,
I had it completely in German.
I set the Xbox one S to English, started the game, it was still in German. Uninstalled the game, reinstalled (bought online) and lo and behold it was in English.
So try setting the console to German and then reinstalling the game.

Greetings

I have the same problem with the language, which is always English and the system language is also German. Changing the language in the system again and again and reinstalling doesn't help because it always remains English in the game. Let's hope it will be fixed with an update where you can change the language yourself in the menu.