Same here, never heard of it. However a websearch gives this:

Tagalog, spoken in: Philippines
Region: Central & south Luzon
Total speakers: First language: 22 million
Second language: more than 65 million

World Ranking: 58
Genetic classification: Austronesian
Malayo-Polynesian
Western
Central Philippine
Tagalog

Official language of: Philippines (as Filipino)

http://en.wikipedia.org/wiki/Tagalog