Lutos (Ruto) is a

Central Sudanic language Central Sudanic is a family of about sixty languages that have been included in the proposed Nilo-Saharan language family. Central Sudanic languages are spoken in the Central African Republic, Chad, South Sudan, Uganda, Congo (DRC), Nigeria and ...

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."

References

Bongo–Bagirmi languages {{ns-lang-stub