The Constitution of the Philippines provides for the use of the vernacular languages as official auxiliary languages in provinces where Filipino is not the lingua franca. Filipinos at large are polyglots; In the case where the vernacular language is a regional language, Filipinos would speak in Filipino when speaking in formal situations while the regional languages are spoken in non-formal settings. This is evident in major urban areas outside Metro Manila like Camarines Norte in the Bikol-speaking area, and Davao in the Cebuano-speaking area. , the case of Ilocano and Cebuano are becoming more of bilingualism than diglossia due to the publication of materials written in these languages.