Mantsi (also known as Ma’as or Mangas) is an endangered Afro-Asiatic language spoken in Mangas town in Bauchi State, Nigeria. Blench (2020) reports that it is also called Mantsi. According to Blench, the structure of Mantsi differs significantly from the other South Bauchi languages. Word lists of Mantsi had previously been published in Kiyoshi Shimizu's (1978) South Bauchi survey, which first mentioned the existence of the language. An unpublished word list was also recorded by Ronald Cosper (n.d.).