Chadic languages
Hausa is a very atypical Chadic language, with a reduced tonal system and a phonology influenced by Arabic. Other well-known Chadic languages include Mupun, Ngas, Goemai, Mwaghavul, Bole, Ngizim, Bade and Bachama. In the East of Nigeria and on into Cameroon are the Central Chadic languages such as Bura, Kamwe and Margi. These are highly diverse and remain very poorly described. Many Chadic languages are severely threatened; recent searches by Bernard Caron for Southern Bauchi languages show that even some of those recorded in the 1970s have disappeared. However unknown Chadic languages are still being reported, such as the recent description of Dyarim.