Swahili has regional dialects; some words differ in Kenya and Tanzania. Somebody in Kenya might use different Swahili words compared to Tanzania.
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Language Borrowings
Swahili borrows from Arabic and English, adding to its vocabulary. The Swahili word 'shule' for school is borrowed from the German 'Schule.'
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Widespread Use
Swahili is a lingua franca in East Africa, used for cross-ethnic communication. At the East African market, vendors and buyers often communicate in Swahili.