L1 users: 192,000 (2013 J. Leclerc). Total users in all countries: 295,000.
Mayo-Kebbi Est region: Mayo-Boneye department, Bongor subprefecture, along Logone river; small group in Chari-Baguirmi region.
Yagwa (Yagoua), Bongor, Wina (Viri), Walia (Walya), Domo, Gizay (Gisey, Guissey), Bugudum (Budugum), Gumay (Goumaye), Ham. All dialects understand Yagoua dialect well; Gizay and Yagoua dialects are 80% mutually intelligible. Lexical similarity: 97% between the Budugum dialect and the most similar other dialect.
Latin script [Latn].
Traditional religion, Christian.