Daju Mongo language

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

Phonology

Consonants

Sounds /z h/ are only heard among Arabic loanwords.
/s/ can be heard as when in the environment of palatal consonants, or before front vowels.

Vowels

Sounds /e, o/ can be heard as when in closed syllables.