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. It has several dialects, including Umali (Tumale), Goy (Tagoi proper), Moreb, and Orig (ŋóóriɡ, Turjuk). Villages are Moreb, Tagoi, Tukum, Tuling, Tumale, Turjok, and Turum (Ethnologue, 22nd edition).

The following describes the Orig dialect.

The consonants are:

Stops /p, t, c, k/ are automatically voiced as [b, d, ɟ, ɡ], between two non-obstruents (obstruents = stops or fricatives.)

Stops and sonorants may occur geminate. Some consonant clusters are allowed (almost invariably two-consonant), most involving sonorants; prenasalised ones are particularly common.

[ʃ, h, z] are found in some Arabic loanwords.

The vowel system is unclear; phonetically, it seems to be basically: /a, e, i, o, u, ɛ, ɔ, ɪ, ʊ, ə/.

There seem to be three phonemic tones: high, low, and occasionally falling.