The languages your company works in. The underlying models are strongly multilingual, so Heidi ingests a German meeting, stores the knowledge, and answers about it in English, or the reverse. Mixed-language companies are the normal case.
Knowledge is stored as meaning, not transcript text, so language at capture time does not wall off language at answer time. Ask in the language you think in.
Falkster is German-founded; operating across languages is lived reality.