 In 1935, the Philippine constitution designated English and Spanish as official languages, but mandated the development and adoption of a common national language based on one of the existing native languages.After study and deliberation, the National Language Institute, a committee composed of seven members who represented various regions in the Philippines, chose Tagalog as the basis for the evolution and adoption of the national language of the Philippines.President Manuel L. Quezon then, on December 30, 1937, proclaimed the selection of the Tagalog language to be used as the basis for the evolution and adoption of the national language of the Philippines.