A good project for training an llm

https://en.wikipedia.org/wiki/Silbo_Gomero

I've met folks that descend from the Zapotec in southern Mexico, and they still use whistling language to talk to each other across mountain valleys.

There are still people speaking a whisking language in the south-west of France[1], not many but it's being taught in school there to preserve it[2]

[1]: https://fr.wikipedia.org/wiki/Langage_siffl%C3%A9_d%27Aas

[2]: https://www.dailymotion.com/video/x4lxhsi

Just like Marvel's Yondu!