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Kobiana (Cobiana) or Buy (Uboi) is a Senegambian language spoken in several villages of Senegal and Guinea-Bissau. The language is referred to as gu-boy by its speakers. Speakers are shifting to Mandinka.
Wilson, William André Auquier. 2007. Guinea Languages of the Atlantic group: description and internal classification. (Schriften zur Afrikanistik, 12.) Frankfurt am Main: Peter Lang.