[bloak]

I don't know much about human evolution and history... However, if language skills evolved after humans left Africa then I'd expect them to have evolved a bit differently in different local populations. Yet innate language skills seem to be the same everywhere. So I would guess that innate language skills haven't changed much in the last 100,000 years. So I would guess that people have been speaking languages like today's languages (in all their glorious variety) for the last 100,000 years.