Tuu languages in the context of Pulmonic-contour click

Khoisan (/ˈkɔɪsɑːn/ KOY-sahn) or Khoe-Sān (pronounced [kʰoɪˈsaːn]) is an umbrella term for the various indigenous peoples of Southern Africa who traditionally speak non-Bantu languages, combining the Khoekhoen and the Sān peoples. Khoisan populations traditionally speak click languages. They are considered to be the historical communities throughout Southern Africa, remaining predominant until Bantu and European colonisation. The Khoisan have lived in areas climatically unfavourable to Bantu (sorghum-based) agriculture, from the Cape region to Namibia and Botswana, where Khoekhoe populations of Nama and Damara people are prevalent groups. Considerable mingling with Bantu-speaking groups is evidenced by prevalence of click phonemes in many Southern African Bantu languages, especially Xhosa.

Many Khoesan peoples are the descendants of an early dispersal of anatomically modern humans to Southern Africa before 150,000 years ago. (However, see below for recent work supporting a multi-regional hypothesis that suggests the Khoisan may be a source population for anatomically modern humans.) Their languages show a limited typological similarity, largely confined to the prevalence of click consonants. They are not verifiably derived from a single common proto-language, but are split among at least three separate and unrelated language families (Khoe-Kwadi, Tuu and Kxʼa). It has been suggested that the Khoekhoe may represent Late Stone Age arrivals to Southern Africa, possibly displaced by Bantu expansion reaching the area roughly between 1,500 and 2,000 years ago.

The San peoples (also Saan), or Bushmen, are the members of any of the indigenous hunter-gatherer cultures of southern Africa, and the oldest surviving cultures of the region. Some interpretations of the genetic analysis suggest divergence from other humans as early as 100,000 to 200,000 years ago. Their recent ancestral territories span Botswana, Namibia, Angola, Zambia, Zimbabwe, Lesotho, and South Africa.

The San speak, or their ancestors spoke, languages of the Khoe, Tuu, and Kxʼa language families, and can be defined as a people only in contrast to neighboring pastoralists such as the Khoekhoe and descendants of more recent waves of immigration such as the Bantu, Europeans, and South Asians.

The Kxʼa (/ˈkɑː/ KAH) languages, also called Ju–ǂHoan (/ˌdʒuːˈhoʊæn/ joo-HOH-an), is a language family established in 2010 linking the ǂʼAmkoe (ǂHoan) language with the ǃKung (Juu) dialect cluster, a relationship that had been suspected for a decade. Along with the Tuu languages and Khoe languages, they are one of three language families indigenous to southern Africa, which are typologically similar due to areal effects.

Nǁng ([ᵑǁŋ]) or Nǁŋǃke is a almost extinct Tuu language spoken in South Africa. It is commonly known by the ambiguous name of its only spoken dialect Nǀuu (Nǀhuki); the ǀʼAuni name for the Nǀuu, ǂKhomani, is used by the South African government. Nǁng had been thought extinct and was no longer spoken on a daily basis when rediscovered, as the two dozen elderly speakers lived in different villages and the younger generations had shifted to the Khoekhoe language. As of October 2025, only one speaker of the Nǀuu dialect remains, the rest of the population having shifted to Khoekhoe and Afrikaans.

Ejective-contour clicks, also called sequential linguo-glottalic consonants, are consonants that transition from a click to an ejective sound, or more precisely, have an audible delay between the front and rear release of the click. All click types (alveolar ǃ, dental ǀ, lateral ǁ, palatal ǂ, retroflex 𝼊 and labial ʘ) have linguo-glottalic variants, which occur as both stops and affricates, and may be voiced. At least a voiceless linguo-glottalic affricate is attested from all Khoisan languages of southern Africa (the Khoe, Tuu, and Kxʼa language families), as well as from the Bantu language Yeyi from the same area, but they are unattested elsewhere.