Passage: Many of the unofficial languages of the San and Khoikhoi people contain regional dialects stretching northwards into Namibia and Botswana, and elsewhere. These people, who are a physically distinct population from other Africans, have their own cultural identity based on their hunter-gatherer societies. They have been marginalised to a great extent, and the remainder of their languages are in danger of becoming extinct.

Question: how are the San and Khoikhoi different from other Africans?
cultural identity based on their hunter-gatherer societies