Tagalog /təˈɡɑːlɒɡ/ is an Austronesian language spoken as a first language by a quarter of the population of the Philippines and as a second language by most of the rest. It is the first language of the Philippine region IV, of Bulacan and of Metro Manila. Its standardized form, officially named Filipino, is the national language and one of two official languages of the Philippines, the other being English. It is related to other Philippine languages such as Ilokano, Bisayan, and Kapampangan. Tagalog is not a tonal language. Wikipedia