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Kasanga (Cassanga) or Haal is a Senegambian language traditionally spoken in a few villages of Guinea-Bissau. The language is referred to as gu-haaca 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.