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The Gula Iro language (autonym kùláál) is a Bua language spoken by some 3,500 people (in 1991) north and east of Lake Iro in southern Chad, between the Bola and Salamat rivers. It has four dialects, according to Pairault:
páṭóól (350 speakers), the northernmost and the least comprehensible to speakers of the other dialects, spoken in and around Badi;
The vowels are: a, e, i, o, u, ɛ, ɩ, ɔ, ʋ. Nasalization (only on a, e, o) and length are both contrastive, and diphthongs can be formed. Tone is phonemic; each vowel must carry high or low tone.
Grammar
Typical word order is subject–verb–object. The basic subject pronouns are: ñó I, mó you (sg.), á he/she/it, pʋ́ we (exclusive), én we (inclusive), í you (pl.), ʋ́ they.
Bibliography
P. Boyeldieu. "La formation du pluriel nominal en kulaal (Tchad): essai de systématisation des documents publiés par C. Pairault". Afrika und Übersee, 1986, n° 69, vol. 2, p. 209-249.
C. Pairault, Documents du parler d'iro: kùláál du Tchad. Langues et Littérature de l'Afrique Noire V. Klincksieck: Paris 1969.