The language is considered to have three dialects: Nyambwa (Cinyambwa or West Gogo), spoken to the west of Dodoma and in Manyoni, Nyaugogo (Cinyaugogo or Central Gogo), spoken in the environs of Dodoma and Tumba (Citumba or East Gogo), spoken to the east. The Gogo group is grouped with Kagulu, which has a 56% lexical similarity with Gogo proper, which leads some[who?] to classify Kagulu as a Gogo dialect. Gogo has about 50% lexical similarity with Hehe and Sangu (both Bena–Kinga languages (G.60), 48% with Kimbu and 45% with Nilamba. These last two are both in Guthrie's Zone F.
Rugemalira, Josephat M. (2009). Cigogo, Kamusi ya Kigogo-Kiswahili-Kiingereza / Kiingereza-Kigogo, na Kiswahili-Kigogo / Gogo-Swahili-English, English-Gogo, and Swahili-Gogo Dictionary. ISBN9987-691-25-0.