There was no common language in the Philippine archipelago when the Spanish arrived in the 16th century.
On December 13, 1937, Presisis of the new 'national language,' Quezon issued Executive order No. 134, s. 1937, approving the adoption of Tagalog as the language of the Philippines', and declared and proclaimed the national language so based on the Tagalog dialect as the national language of the Philippines [REF].