Tumak language
Tumak, also known as Toumak, Tumag, Tummok, Sara Toumak, Tumac, and Dije, is an Afro-Asiatic language spoken in the southwestern Chadian prefectures of Moyen-Chari and Koumra. Motun and Tumak dialects have a lexical similarity of only 70%; Blench lists Tumak, Motun, and Mawer as separate languages. Most Motun speakers use some Sara.
The "Gulei" listed in Greenberg might be a dialect of Tumak.
