Khoisan languages is the name for a group of languages that are spoken in Southern Africa. All of these languages have click consonants, and they are not part of the Niger–Congo languages, the Nilo-Saharan languages, or the Afroasiatic languages. These languages are not in one common language family, there are at least three such families. There are also some language isolates on the territory where Khoisan languages can be found. It is not possible to construct or find a language that is the common ancestor of the other languages.