Lutos (Ruto) is a Central Sudanic language of CAR and Chad. Two distinctive dialects are Lutos/Ruto proper and Nduka.International Encyclopedia of Linguistics ed. William J. Frawley · 2003 p303 " In Central African Republic: 17,000 speakers in Nde ́le ́, Kaga Andoro, and Kabo subprefectures. Dialects are Nduka (Ndouka, Ndoukwa), Lutos (Ruto, Routo, Rito, Luto, Louto), Wada (Wad), Nduga (Ngougua), Konga."
Phonology +Consonants LabialAlveolarRetroflexPalatalVelarLabiovelarGlottal Plosive Implosive Fricative Nasal Approximant, /s/ can sometimes be heard as [ʃ] syllable-finally. +VowelsFrontCentralBackHigh Mid-high Mid-low Low Additionally, there exists the diphthong /ua/. It cannot be lengthened nor nasalised.
Lutos has three tones: high, mid, low. References