Hi, while I was testing the Polish translation in AnkiMobile I saw that parts that had not yet been translated were shown in German. I also checked other languages and it happens there too (for example the “Empty Cards” text in the settings appears in Polish when Language is set to Japanese).
When a Language has an active Translator it doesn’t really make a difference but when there’s none it can make people confused when they see a text from a completely different language (I think that English text should appear).