The Mbam languages are a group of erstwhile zone-A Bantu languages

Bantu languages

The Bantu languages constitute a traditional sub-branch of the Niger–Congo languages. There are about 250 Bantu languages by the criterion of mutual intelligibility, though the distinction between language and dialect is often unclear, and Ethnologue counts 535 languages...

 which some lexicostatistical

Lexicostatistics

Lexicostatistics is an approach to comparative linguistics that involves quantitative comparison of lexical cognates. Lexicostatistics is related to the comparative method but does not reconstruct a proto-language...

 studies suggest are not actually Bantu, but related Southern Bantoid languages. Janssens (1992–93) posited that they are all of Guthrie's zone A.60 languages, half of his A.40 languages, and perhaps Bube (A.31). Blench (2011) included Jarawan in A.60.

• Sanaga (A60): Tuki (Bacenga), Leti
• West Mbam (A40): Bati (A60), Nomaande (Mandi), Tuotomb, Yambeta, Tunen (Nyokon, Banen)
• Yambasa (A60): Nubaca, Elip, Mbule
  Mbule language
  The Mbule language, also called Dumbule or Mbola, is an endangered southern Bantoid language spoken by a few people in central Cameroon....
  
  , Mmaala, Nugunu, Yangben
• Jarawan
  Jarawan languages
  Jarawan is a dialect cluster that is closely related to, or perhaps a branch of, the Bantu languages. Blench says that it almost certainly belongs with the A.60 languages, which are part of Mbam.-Languages:...
  
  (See)
• ?Bube (A31)