Wow Geno, you keep getting in before me.

I imagine the stakes must be bigger than just her. So much of the future of tribes rests on the current generation learning about their heritage. If the grandfather must teach her the ways of her people or else the tribe will fall apart forever, then you have instantly set up the conflict that will drive the film.

Being Australian, this kind of thing is happening before our eyes. Hundreds of languages have been lost in less than a century.