[leobg]

I'm not sure.

Making this work is limited by the availability by reliable transcription models. Which, in turn, are limited the availability of large training corpora. Those don't exist for rare languages.

Also, if people choose to listen to a Nepali speaker through an AI translator, that does give speakers of this language "a voice" - but it doesn't really preserve that language. You might argue, on the contrary, that it may remove any remaining incentives to learn that language.