The document introduces the major dialects spoken in the Philippines, which are Ilocano, Tagalog, and Cebuano. These three dialects, along with other indigenous languages, are historically related and derived from original Indonesian as part of the Austronesian language family. The document defines a dialect as a particular form of language associated with a specific region or social group. It also lists the 8 major dialects spoken in the Philippines, with Tagalog being the most commonly taught language.