Figure 5. Ethnolinguistic Map

Source: Based on information from Jean Cabot, Atlas Practique du Tchad, Paris, 1972, 36-37.

Similarities of language do not imply other congruences. Nilo-Saharan language speakers, for example, display a variety of life-styles. Nomads in the Sahara, semisedentary and sedentary peoples in the Sahel, and sedentary populations in the soudanian zone all may speak Nilo-Saharan languages.

Data as of December 1988