I live in switzerland where we speak german (de_ch). The problem is, that this game doesn’t correctly check this and default to english language, which is wrong. My Conosle settings are set as this:
Language: German
Region: German (Swiss)
Location: Switzerland
Keyboard: German (Swiss)
It seem as the game does only detect de_de and not the other german regions as de_ch (Swiss) and de_at (austria). Also I think the same issue will be for our other 2 languages here in switzerland: fr_ch and it_ch.