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In page Languages of Africa:

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Of the 1 billion Africans (in 2009), about 17 percent speak an Arabic dialect.[citation needed] About 10 percent speak Swahili,[citation needed] the lingua franca of Southeast Africa; about 5 percent speak a Berber dialect;[citation needed] and about 5 percent speak Hausa, which serves as a lingua franca in much of the Sahel. Other large West African languages are Yoruba, Igbo, Akan and Fula. Major Horn of Africa languages are Somali, Amharic and Oromo. Lingala is important in Central Africa. Important South African languages are Sotho, Tswana, Pedi, Venda, Tsonga, Swazi, Southern Ndebele, Zulu, Xhosa and Afrikaans.[1]