Tagalog is an Austronesian language spoken as a first language by a quarter of the population of the Philippines and as a second language by the majority. It is the first language of the Philippine region IV (CALABARZON and MIMAROPA), 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 the Bikol languages, Ilokano, the Visayan languages, and Kapampangan, and more distantly to other Austronesian languages such as Indonesian, Hawaiian and Malagasy.
The word Tagalog is derived from the endonym taga-ilog (“river dweller”), composed of tagá- (“native of” or “from”) and ílog (“river”). Very little is known about the ancient history of the language; linguists such as Dr. David Zorc and Dr. Robert Blust speculate that the Tagalogs and other Central Philippine ethno-lingistic groups had originated in Northeastern Mindanao or the Eastern Visayas.