About six groups of Central Sudanic languages are generally accepted as valid, but their interrelationships are not clear. They are customarily divided into East and West branches, though this has not been demonstrated. Eastern Central Sudanic languages (not to be confused with Eastern Sudanic languages) include such languages as Lendu, Mangbetu, and Lugbara, and are concentrated in the northeast corner of DR Congo. The western division includes Bongo–Bagirmi and Kresh, which are scattered across Chad, the CAR, and South Sudan.
Starostin (2011) notes that the poorly attested language Mimi of Decorse is suggestive of Central Sudanic, though he provisionally treats it as an isolate. The inclusion of Kresh has yet to be demonstrated (Boyeldieu 2010).