Lutos language

Lutos (Ruto) is a Central Sudanic language of CAR and Chad. Two distinctive dialects are Lutos/Ruto proper and Nduka.

Phonology
Additionally, there exists the diphthong /ua/. It cannot be lengthened nor nasalised.
 * /s/ can sometimes be heard as [ʃ] syllable-finally.

Lutos has three tones: high, mid, low.