One thing bothers me about the Boost: people are suggested to me that I can't understand because I don't speak their language. It would be nice if these promotions were more specialized.

For example, if someone often watches German & English streamers, that they are suggested to him.

What should I do with a streamer if I can't understand him?

Also, by being "Promoted" you don't see the viewership & you can't mark the person as "not interested" like you can with normal streams.