According to The New Encylopedia Britannica (1989, 846), the Dagomba, also known as the DagBamba, reportedly inhabit the northen region of Ghana. Documentation-Réfugié (2-11 Sept. 1989, 8) reports that the Dagomba comprise 15.8% of the total population of Ghana. The Dagomba are a patrilineal society divided into commoners and chiefly families. Matrilineal descent, however, is recognized for its "contribution of sprititual attributes" (The New Encylopedia Britannica 1989, 846.). The Dagomba, who belong to the Mole-Dagbane ethnic group, speak a language called Dagbane. According to the Area Handbook Series: Ghana: A Country Study (Nyrop 1971, 101),
Dagbane serves commonly as a lingua franca throughout a large part of the north and was once the officially recognized language of the Northern Territories under British rule

For further information on this subject, please refer to the attached document.

Nyrop, Richard F., ed. 1971. Area Handbook Series: Ghana: A Country Study. Washington: American University, Foreign Area Studies.

Documentation-Réfugiés [Paris]. 11-20 September 1989. No. 92. "Le Ghana," p. 8.

The New Encyclopaedia Britannica. 1989. Micropaedia. 15th ed. Vol. 3. Chicago: Encyclopaedia Britannica Inc.

The New Encyclopaedia Britannica. 1989. Micropaedia. 15th ed. Vol. 3. Chicago: Encyclopaedia Britannica Inc.