Bijago or Bidyogo is the language of the Bissagos Archipelago of Guinea-Bissau. Bidyogo is the "dominant mother tongue of the archipelago population", though it is not used in schooling there, a role that has been taken over by Kriol since the 1990s. There are some difficulties of grammar and intelligibility between dialects, with the Kamona dialect being unintelligible to the others.