L1 users: 40,000 (1993 SIL).
Ituri province: Irumu territory; Nord-Kivu province: northwest of Beni.
Bombi-Ngbanja, Nyaku. Lexical similarity: 94% between dialects, closely related to other Bira languages: 80% with Kaiku [kkq], 72% with Bhele [bhy], 70% with Komo [kmw], nearly 60% with Bera [brf] and Amba [rwm], 46% with Beeke [bkf], 45% with Bwa [bww], 40% with Lika [lik] and Bali [bcp], 26% with Mbo [zmw], 22% with Budu [buu] and Ndaka [ndk].
Also use Congo Swahili [swc], especially about 25% of men, and 10%–15% of women have routine proficiency in it, but older adults have no proficiency.
Traditional religion, Christian.