Predominantly Tagalog-speaking regions in the Philippines. The color-schemes represent the four dialect zones of the language: Northern, Central, Southern and Marinduque.
The majority of residents in Camarines Norte and Camarines Sur speak Bikol as their first language but these provinces nonetheless have significant Tagalog minorities.
In 2009, the Department of Education promulgated an order institutionalizing a system of mother-tongue based multilingual education ("MLE"), wherein instruction is conducted primarily in a student's mother tongue (one of the various regional Philippine languages) until at least grade three, with additional languages such as Filipino and English being introduced as separate subjects no earlier than grade two.
In secondary school, Filipino and English become the primary languages of instruction, with the learner's first language taking on an auxiliary role.
In 1613, the Franciscan priest Pedro de San Buenaventura published the first Tagalog dictionary, his "Vocabulario de la Lengua Tagala” in Pila, Laguna.
The first substantial dictionary of the Tagalog language was written by the Czech Jesuit missionary Pablo Clain in the beginning of the 18th century.
According to the Philippine Statistics Authority, as of 2014 there were 100 million people living in the Philippines, where almost all of whom will have some basic level of understanding of the language.
At present, no comprehensive dialectology has been done in the Tagalog-speaking regions, though there have been descriptions in the form of dictionaries and grammars of various Tagalog dialects.
Ethnologue lists Manila, Lubang, Marinduque, Bataan (Western Central Luzon), Batangas, Bulacan (Eastern Central Luzon), Tanay-Paete (Rizal-Laguna), and Tayabas (Quezon) as dialects of Tagalog; however, there appear to be four main dialects, of which the aforementioned are a part: Northern (exemplified by the Bulacan dialect), Central (including Manila), Southern (exemplified by Batangas), and Marinduque.
Many of the older generation in the Philippines feel that the replacement of English by Tagalog in the popular visual media has had dire economic effects regarding the competitiveness of the Philippines in trade and overseas remittances.
Subject to provisions of law and as the Congress may deem appropriate, the Government shall take steps to initiate and sustain the use of Filipino as a medium of official communication and as language of instruction in the educational system.