The Constitution of 1987 appears relevant...from Article 14:
SECTION 7. For purposes of communication and instruction, the official languages of the Philippines are Filipino and, until otherwise provided by law, English.
SECTION 6. The national language of the Philippines is Filipino. As it evolves, it shall be further developed and enriched on the basis of existing Philippine and other languages.
SECTION 8. This Constitution shall be promulgated in Filipino and English and shall be translated into major regional languages, Arabic, and Spanish.
SECTION 9. The Congress shall establish a national language commission composed of representatives of various regions and disciplines which shall undertake, coordinate, and promote researches for the development, propagation, and preservation of Filipino and other languages.
===============
Of the more than a hundred languages being spoken by the different ethno linguistic groups of dwellers in the more than seven thousand islands comprising the Philippines, eight of them are considered major languages. These major languages are Ilocano, Pangasinan, Pampango, Tagalog, Bicol, Cebuano, Hiligaynon and Waray-Samarnon.