There is no opensource translation model to run on the phone yet. There are online services, but those are a massive privacy issue because all your posts go over there. They can easily track you.
Discussion
What if you had a Linux server with an open source language translation model running as an Amethyst only service. Which handles translation requests over the tor network?
Traffic could get a little heavy, but at this early adoption stage this could be a zappable feature request to keep it up and running.
Pipe dream maybe, or a fun afternoon project.
I'll leave that up to you.
It seems that CTranslate2 can be compiled to run on Android.
