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For the language families subsumed under Khoisan, see Khoisan languages.  Khoisan  (/ËkÉÉªsÉËn/ ; also spelled Khoesaan, Khoesan or KhoeâSan) is a unifying name for two groups of peoples of Southern Africa, who share physical and putative linguistic characteristics distinct from the Bantu majority of the region.arious Y-chromosome studies since confirmed that the Khoisan carry some of the most divergent (oldest) Y-chromosome haplogroups. These haplogroups are specific sub-groups of haplogroups A and B, the two earliest branches on the human Y-chromosome tree.
But at least 26 others are spoken by different ethnic communities. These fall into two different language groups â Bantu and Khoisan. The Khoisan tongues are sometimes called the âclickâ languages, because of their integral click sounds. One Khoisan tongue is !Xoo, spoken by a few thousand people in Botswana. With five basic clicks and 17 accompanying ones, as well as vowels using four different tones of voice, !Xoo is the most complex-sounding language in the world.