Ana magana da Biu – Mandara ko yaren Cadi ta Tsakiya na dangin Afro-Asiatic a cikin Najeriya, Chadi da Kamaru . Wanda aka fi magana dashi Kamwe, tare da masu magana dashi 300,000. An sake gina Proto-Central Chadic ta Gravina a (2014). Gravina (2014) ya rarraba yankin Chadi ta Tsakiya kamar haka, a zaman wani ɓangare na sake gina harshe mai kyau. Haruffa da lambobi a cikin maƙalai suna dacewa da rassa a cikin rarrabuwa na baya. Mafi girman canje-canje shine watsewa da sake sanya harsunan tsohuwar reshen Mafa (A.5) da reshen Mandage (Kotoko) (B.1). Kudu Kudu Bata (A.8) Bata Daidai: Bacama, Bata, Fali, Gude, Gudu, Holma (†), Jimi, Ngwaba (daga A.1 Tera), Nzanyi, Sharwa Tsuvan: Tsuvan, Zizilivakan Daba (A.7) Daba Dace: Daba, Mazagway Hidi Mina: Mina, Mbudum Buwal: Buwal, Gavar Mafa (= Kudu A.5 Mafa (d)): Mafa, Mefele, Cuvok Tera (A.1): Gabashin Tera: Boga, Ga'anda, Hwana (Yammacin Tera): Jara, Tera Sukur (A.6) Hurza Hurza (daga A.5 Mafa): Vame, Mbuko Arewa Margi – Mandara – Mofu Margi (A.2) Bura: Bura, Cibak, Putai, Nggwahyi Margi Dace: Kilba, Margi Kudu, Margi Mandara (A.4): Wandala: Mandara