At leasst 2 Languages would be nice!

[2/2]This will partially tackle Anonim1's issue by instead of the streamer broadcasting to multiple languages, allowing the USER to filter by multiple languages. That way they can find content that they understand.

To expand a little on Ltzonda's answer, I'd propose the ability to select multiple languages to filter by. For an example of this, check this (poorly made) image: https://i.lkd70.io/cfld62.pngAs you can see, you have the ability to show multiple languages at once, thus not restricting yourself to one language. 1/2]

maybe allow viewers to also set Primary, secondary & tertiary languages on a dynamically generated homepage making each homepage unique to each viewers language preferences

I like the idea of setting a Primary & secondary language, to show firstly which language you primarily stream in (resulting in which language homepage you are displayed) aswell as a secondary/tertiary language that shows viewers you also speak those languages.