Auto selection and multiple languages would be great, but at least one switch to chose language when uploading a file would make the app 300% more useful!

Language detection for when one is speaking multiple languages within the call gets my vote. Also language selection by meeting.

Default language selection : have an option to transcribe and summarize by default in the original (detected) language of the discussion – as we alternate between English and French in Eastern Canada, and I suspect the same between Spanish and English in many parts of Southern USA. Probably an essential option in most European countries.