The term Daju was a linguistic designation that was applied to a number of groups scattered from western Kurdufan and southwestern Darfur states to eastern Chad.
The Tagoi language is a Kordofanian language, closely related to Tegali, spoken near the town of Rashad in southern Kordofan in Sudan, about 12 N, 31 E. Unlike Tegali, it has a complex noun class system, which appears to have been borrowed from more typical Niger–Congo languages.