The vast majority of endangered languages don't have a written history. Most don't even have a writing system, much less a widely adopted one and literate writ

The vast majority of endangered languages don't have a written history. Most don't even have a writing system, much less a widely adopted one and literate writers. Without writing, history devolves into a bunch of creation myths, which can be mildly interesting but tend to be very formulaic. Witness Australian Aboriginal Dreamtime stories, which span 40000 years of history, but can be reasonably replicated with a Markov chain of the (ancestor,kangaroo,goanna,wombat) creating (geographical feature) after it (fought,danced,mated,was cast away) (by,with) another (ancestor,kangaroo,goanna,wombat).