I think it would be great to be able to click a button on a comment\post and have it translate to your language. I think its possible to build a way to include this in a privacy respecting way (im not a coder so forgive my ignorance) if we use something like the google translate scraper that is used for this privacy respecting google translate frontend https://github.com/thedaviddelta/lingva-translate

Making it easier for people to communicate across languages would be pretty sweet for the fediverse.