Constitution of the Republic of Philippines
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.
Subject to provisions of law and as the Congress may deem appropriate, the Government shall take steps to initiate and sustain the use of Filipino as a medium of official communication and as language of instruction in the educational system.
Section 7. For purposes of communication and instruction, the official languages of the Philippines are Filipino and, until otherwise provided by law, English.
The regional languages are the auxiliary official languages in the regions and shall serve as auxiliary media of instruction therein.
Spanish and Arabic shall be promoted on a voluntary and optional basis.
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.