Complex sentence: The evidence of the Khoisan's original presence in South Africa is the distribution of their languages today, whose groups often have extreme differences in structure and vocabulary despite close proximity, which demonstrates a long period of settlement and co-evolution of languages in the same region.
Split into simpler sentences: The evidence of the Khoisan's original presence in South Africa is the distribution of their languages today. Khoisan language groups often have extreme differences in structure and vocabulary despite close proximity, which demonstrates a long period of settlement and co-evolution of languages in the same region.