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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