The Bambukic a.k.a. Yungur–Jen languages form a branch of the provisional Savanna languages, a reduced form of the Waja–Jen branch of the old Adamawa languages family (G7, G9, G10). They are spoken in eastern Nigeria.
Kleinewillinghöfer (1996) notes the affinities of the Bikwin languages, which were unknown to Greenberg, with the Jen languages. Subclassification follows Blench (2004).
In the Adamawa Languages Project website, Kleinewillinghöfer (2011) classifies the Ɓəna-Mboi or Yungur group as follows.
Kleinewillinghöfer (2015) classifies the Bikwin-Jen group as follows in the Adamawa Languages Project website.
Below is a list of language names, populations, and locations from Blench (2019).
|Language||Branch||Cluster||Dialects||Alternate spellings||Own name for language||Endonym(s)||Other names (location-based)||Other names for language||Exonym(s)||Speakers||Location(s)|
|Longuda||Longuda||Nya Guyuwa (Guyuk plains), Nya Ceriya (Banjiram=Cirimba/Gerembe hill), Nya Tariya (Kola=Taraba), Nya Dele (Jessu=Delebe), Nya Gwanda (Nyuar=Gwandaba)||Languda, Nunguda, Nungura, Nunguraba||nyà núngúrá Guyuk, Nungurama Nyuar||Núngúráyábá Guyuk, Nùngùrábà Jessu, Lóngúrábá Kola||13,700 (1952: Numan Division); 32,000 (1973 SIL)||Adamawa State, Guyuk LGA; Gombe State, Balanga LGA|
|Tha||Bikwin-Jen||Taraba State, Karim Lamido LGA and Adamawa State, Numan LGA. Joole Manga Dìdí village|
|Dza||Jen||Dza, Ja||nnwa’ Dzâ||Èédzá, ídzà||Jenjo, Janjo, Jen||6,100 (1952). Figures for Dza may include other Jen groups such as Joole and Tha (q.v.)|
|Joole||Jen||èèʒìì||nwá èèʒìì||Taraba State, Karim Lamido LGA and Adamawa State, Numan LGA. Along the Benue River.|
|Mingang Doso||Jen||Munga||ŋwai Mәngàn||Mingang Doso||Dosọ||Taraba State, Karim Lamido LGA. 15 km. East of Karim Lamido town. One village and associated hamlets.|
|Burak||Bikwin||yu Ɓuurak pl. yele Ɓuurak||nyuwǎ Ɓúúrák||‘Yele||Shongom [name of an LGA]||4,000 (1992 est.)||Gombe State, Shongom LGA, Burak town. 25 villages. A highly distinctive form is spoken in Tadam village.|
|Kyak||Bikwin||Kyãk||Kyãk||Bambuka||10,000 (SIL)||Taraba State, Karim Lamido LGA, Bambuka|
|Leelạu||Bikwin||Lelo||Munga||One village and an associated hamlet||Taraba State, Karim Lamido LGA. 15 km. East of Karim Lamido town.|
|Loo||Bikwin||Shúŋ̣ ó ̣||Shúŋ̣ ó–̣ North, Shúŋ̣ ó–̣ South||8,000 (1992 est.)||Kaltungo LGA, Gombe State, Taraba State, Karim Lamido LGA. 30 km. North of Karim Lamido town. Lo village and associated hamlets.|
|Maghdi||Bikwin||Mághdì||Mághdì sg., lee Mághdì pl.||Widala also applies to Kholok||Fewer than 2,000 (1992)||Taraba State, Karim Lamido LGA. A section of the Widala|
|Mak||Bikwin||Panya, Zo||Mak||LeeMak||Panya, Panyam (From Poonya, the name of a founding hero) Zoo||Taraba State, Karim Lamido LGA. 15 km. north of Karim Lamido town.|
|Mɔɔ||Bikwin||ŋwaa Mɔ́ɔ̀||yáá Mɔ̀ɔ̀||Gwomo, Gwom, Gwomu, Gomu||Taraba State, Karim Lamido LGA|
|Ɓena||Yungur||Ɓәna is divided into 17 clans each of which is said to have a distinct speech-form, but they are too closely related to actually be distinct dialects||Ebina, Binna, Gbinna||Ebәna||Ɓәna||Lala (not recommended), Purra (general term for northern Ɓәna)||Yungur, Yangur||Yungirba, Yungur||44,300 (1963) probably including Lala and Roba; fewer than 100,000 (1990 est.)||Adamawa State, Song and Guyuk LGAs|
|Kaan||Yungur||Libo||Adamawa State, Guyuk LGA|
|Lala cluster||Yungur||Lala||Ɓәna||30,000 (SIL); 44,300 with Ɓәna (1963)||Adamawa State, Guyuk, Song and Gombi LGAs|
|Mboi cluster||Yungur||Mboi||Mboire, Mboyi||3,200 (1973 SIL)||Adamawa State, Song LGA|
|Gana||Yungur||Mboi||Gәna||Mboire, Mboyi||1,800 (LA 1971)||Adamawa State, Song LGA, northwest of Song. Livo village and associated hamlets|
|Banga||Yungur||Mboi||Adamawa State, Song LGA, west of Loko. Banga village and associated hamlets|
|Haanda||Yungur||Mboi||Handa||1,370 (LA 1971)||Adamawa State, Song LGA, west of Loko. Handa village and associated hamlets|
|Voro||Yungur||Vɔrɔ||Ebәna, Ebina||Ɓena||Woro||Yungur||Adamawa State, Song and Guyuk LGAs, south of the Dumne road. Waltande and associated hamlets.|