Gulei_language_(Chadic)
Tumak language
Chadic language spoken in Chad
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 (Mod) and Tumak dialects have a lexical similarity of only 70%;[1] Blench (2006) lists Tumak, Motun, and Mawer as separate languages.[2] Most Motun speakers use some Sara.[1]
The "Gulei" listed in Greenberg might be a dialect of Tumak.[3]