Aja is a Central Sudanic language

Central Sudanic languages

Starostin notes that the poorly attested language Mimi of Decorse is suggestive of Central Sudanic, though he provisionally treats it as an isolate.-References:...

 spoken in the southern South Sudan

South Sudan

South Sudan , officially the Republic of South Sudan, is a landlocked country located in the Sahel region of northeastern Africa. It is also part of the North Africa UN sub-region. Its current capital is Juba, which is also its largest city; the capital city is planned to be moved to the more...

ese province of Bahr el Ghazal

Bahr el Ghazal

The Bahr el Ghazal is a region of western South Sudan. Its name comes from the river Bahr el Ghazal.- Geography :The region consists of the states of Northern Bahr el Ghazal, Western Bahr el Ghazal, Lakes, and Warrap. It borders Central African Republic to the west...

 and along the South Sudanese border in the Central African Republic

Central African Republic

The Central African Republic , is a landlocked country in Central Africa. It borders Chad in the north, Sudan in the north east, South Sudan in the east, the Democratic Republic of the Congo and the Republic of the Congo in the south, and Cameroon in the west. The CAR covers a land area of about ,...

. Although the tribe considers itself to be Kresh, the language is unintelligible to the Kresh language

Kresh language

Kresh, also known as Gbaya is a Central Sudanic language or dialect cluster of South Sudan.Kresh is dialectically diverse...

. It is largely Banda

Banda languages

Banda is a family of Ubangian languages spoken by the Banda people of Central Africa.-Languages:Olson classfies the Banda family as follows :*Central**Central Banda...

in vocabulary, though it remains Kresh in structure. Most members of the tribe are bilingual in Kresh. Alternate spellings are Adja and Ajja.