Daju Mongo, or Wadai Daju, is an Eastern Sudanic language, one of three closely related languages in the area called "Daju" (the other two being the Nyala language and the Sila language. It is spoken in Chad by the Dar Daju Daju people near the Darfur border. There are three dialects, Bardangal, Eref, and Gadjira.