https://github.com/australia/mobtranslate.com/
In it's current iteration the homepage is just running dictionaries through OpenAI. (my tribes dictionary fits in a 100k context window)
My old ambitions can be found somewhat here -> https://github.com/australia/mobtranslate-server
That being said, the OpenAI models do a fantastic job at translating sentences so I've put my own model research further to the back. (will try to find some examples)
I can't speak of the true preservation, not many native speakers left, but in my mind that's not even all that important from a personal/cultural perspective.
If the youth who are interested in learning more about their language have a nice interface with 70-80% accurate results and they enjoy doing/learning it then that is a win to me. (and kind of how language evolves anyway) (the noun replacement seems to work great, but grammar is obviously wishy-washy)
(At this point, I just rushed to get my tribes dictionary crawlable so hopefully it will be in a few models next training phases)