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AI headphones translate multiple speakers at once, cloning their voices in 3D sound
(www.washington.edu)
This is a most excellent place for technology news and articles.
Check whisper apk on fdroid. The thing runs local. It does just this. The model gets audio in an undetermined language, figures out which one automatically, transcribes it, translates it to English (only English atm) and then it speaks it out. It's not using any acceleration and its a very early build. My Pixel 9 is getting about 3 seconds delay from input to output. It's all running local.
It's doable.