Abu is a Ramu language of Papua New Guinea.

A supposed dialect, Auwa, apparently with few speakers, may be a distinct language.

One confirmed dialect, however, is Sabu, which is spoken in the northeast of the language's region.

Adjora is spoken in the Madang and East Sepik provinces of Papua New Guinea, specifically between Angoram, Ramu, and Sepik rivers and in the northwest of Madang.

[3]: 350  It is also closely related to the Waran language (also known as Banaro).