Don't we have that? My browser offers to translate pages that aren't in English, youtube creates auto generated closed captions, which you can then have it translate to English (or whatever), we have text to speech models for the major languages if you want to hear it verbally (I have no idea if the youtube CC are accessible via an api, but it is certainly something google could do if they wanted to).

I'll probably get pushback on the quality of things like auto-generated subtitles, but I did the above to watch and understand a long interview I was interested in but don't possess skill in the language they were using. That was to turn the content into something I already know, but I could do the reverse and turn English content into French or whatever I'm trying to learn.