How this works
Speaking vs. reading
Two different lists matter here. BabelStreamer's speech recognition — what it understands you saying — currently covers English, French, German, and Spanish. Its caption translation — what viewers can read — covers all 13 languages below, regardless of which of those four you speak. A German-speaking streamer can offer Japanese captions; an English speaker can offer Brazilian Portuguese. See the OBS plugin page for how speech recognition is set up.
Caption languages
All 13, one by one
More languages are on the roadmap — see what's coming next.