Yaren Biu–Mandara
Ana magana da Biu – Mandara ko yaren Cadi ta Tsakiya na dangin Afro-Asiatic a cikin Najeriya, Chadi da kuma Kamaru . Wanda aka fi magana dashi Kamwe, tare da masu magana dashi 300,000. 

An sake gina Proto-Central Chadic ta Gravina a (2014).

Harsuna

Gravina (2014) 
Gravina a shekarar (2014) ya kuma 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 ( Malgwa ), Glavda
 Dghwede: Cineni, Dghwede, Guduf, Gava, Gvoko
 Podoko: Podoko, Matal (daga A.5 Mafa)
 Mofu (wani yanki na Kudu A.5 Mafa)
 Tokombere: Ouldeme, Mada, Muyang, Molokwo
 Meri: Zulgo, Gemzek, Merey, Dugwor
 Ingantaccen Mofu: Mofu ta Arewa, Mofu-Gudur
 Maroua
 Maroua (wani yanki na Kudu A.5 Mafa (c)): Giziga ta Arewa, Giziga ta Kudu, Mbazla
 Lamang
 Lamang (Yammacin A.4 Wandala): Lamang, Hdi, Mabas
 Higi
 Higi (A.3): Bana, Hya, Psikyɛ, Kamwe, Kirya-Konzel
 Musgum – Arewacin Kotoko
 Tsibirin Kotoko: Buduma
 Kotoko ta Arewa: Mpade, Afaɗə, Malgbe, Maltam
 Musgum (B.2): Musgum, Mbara, Muskum (†)
 Kotoko Center
 Cibiyar Kotoko: Lagwan, Mser
 Kotoko ta Kudu
 Kotoko ta Kudu: Zina, Mazera
 Gidar

Ba a rarraba Jilbe ba, saboda babu wasu tushe.

Blench (2006) 
Rassan Biu – Mandara a al'adance suna zuwa ko dai sunaye ko haruffa da lambobi a cikin tsarin fasali. Blench (2006) ya tsara su kamar haka: 

 Tera (A.1): Tera, Pidlimdi (Hinna), Jara, Ga'anda, Gabin, Boga, Ngwaba, Hwana
 Bura – Higi
 Bura (A.2): Bura-Pabir (Bura), Cibak (Kyibaku), Nggwahyi, Huba (Kilba), Putai (Marghi West), Marghi Central (Margi, Margi Babal), Marghi South
 ? Kofa
 Higi (A.3): Kamwə ( Psikyɛ, Higi), Bana, Hya , ? Kirya-Konzəl
 Wandala – Mafa
 Wandala (Mandara) (A.4)
 Gabas: Wandala (Mura, Mandara, Malgwa), Glavda (Gəlvaxdaxa)
 Parəkwa (Podoko)
 Yammaci: Gəvoko, Guduf-Gava ( Cineni ), Dghweɗe, Hdi (Xədi, Hedi, Tur), Lamang, Woga, Vemgo, Mabas
 Sukur (Sakwun, A.6)
 Mafa (A.5)
 Arewa maso gabashin Mafa: Vame (Pəlasla), Mbuko, Gaduwa
 Matal (Muktele)
 Kudu Mafa
 (a) Wuzlam (Ouldémé), Muyang, Maɗa, Məlokwo
 (b) Zəlgwa-Minew, Gemzek, Ɗugwor, Mikere, Merey
 (c) Giziga ta Arewa, Giziga ta Kudu, Mofu ta Arewa, Mofu-Gudur (Kudancin Mofu), Baldemu (Mbazlam)
 (d) Cuvok, Mafa, Mefele, Shügule
 Daba (A.7)
 Arewa Daba: Buwal (Gadala), Gavar (Kortchi)
 Kudu Daba: Mina (Besleri, Hina), Daba ( Mazagway ), Mbədam
 Bata (Gbwata) (A.8): Bacama, Bata (Gbwata), Sharwa, Tsuvan, Gude, Fali na Mubi, Zizilivakan (Ulan Mazhilvən, Fali na Jilbu), Jimi (Jimjimən), Gudu, Holma (†), Nzanyi
 Harshen (Kotoko) (B.1)
 Harshen Kudu: Msər (Kousseri), Lagwan (Logone)
 ? Jilbe
 Yankin Arewa: Afaɗə, Maslam, Malgbe (Gulfey), Mpadə
 Buduma (Yedina)
 Gabas – Tsakiya
 Gidar (Kaɗa)
 Munjuk (B.2): Mbara, Muskum (Muzuk) (†), Mpus, Beege (Jafga), Vulum (Mulwi)
 Mida'a (<B.1): Jina, Majəra

Newman (1977) 
Tsarin Chadi ta Tsakiya ta Newman (1977):

Sunaye da wurare (Najeriya) 
Da ke ƙasa akwai jerin sunayen harshe, yawan jama'a, da wurare (a cikin Najeriya kawai) daga Blench (2019).

Kudu

Arewa

Lambobi 
Kwatanta lambobi a cikin kowane yare:

Kalmomin Proto-Central Chadic
Kalmomin Proto-Central Chadic (Proto-Biu-Mandara) da Hausa da Turanci:

Duba kuma 
 Jerin ayyukan sake gina yankin Chadi na Tsakiyar-Tsakiya (Wiktionary)

Bayanan kula 

 Albarkatun kasar Chadi ta tsakiya a africanlanguages.org

Manazarta 
Harsunan Chadic