[codebje]

It only took 200 years for 200 of those 260 languages to be lost or brought to the edge of extinction. It's at least plausible and to me quite believable that the arrival of a group with a technological advantage 4,000 years ago could have had a substantial impact on the existing languages.

The same set of languages definitely will not have survived for 60,000 years. Tribes come and go, merge and split. Outside influences bring in new words and grammatical structures. Oral tradition is a low fidelity carrier of language and culture, and easily accommodates change in language.

[permo-w]

sure it’s plausible, but is there any linguistic evidence of it being the case? otherwise there’s very little point in discussing it