Which parts of the Philippines is Ilocano mostly spoken?

Ilocano, also known as Ilokano language, is predominantly spoken in the following parts of the Philippines:

* Region I (Ilocos Region): This region is the heartland of the Ilocano language, with Ilocano being the primary language in all four provinces:

* Ilocos Norte

* Ilocos Sur

* La Union

* Pangasinan (while Pangasinan language is dominant, Ilocano is also widely spoken)

* Region II (Cagayan Valley): Ilocano is also spoken in some parts of this region, particularly in the northernmost provinces:

* Cagayan

* Isabela

* Other areas: Smaller Ilocano-speaking communities can also be found in:

* Region III (Central Luzon): Some municipalities in Zambales and Bataan.

* Region IV-A (CALABARZON): Certain areas of Batangas and Quezon.

* National Capital Region (NCR): Ilocano communities exist in Manila and other cities.

* Other regions: Ilocano communities are scattered throughout the Philippines due to migration.

It's important to note that while Ilocano is the majority language in the Ilocos Region, other languages like Pangasinan, Kapampangan, and Tagalog are also spoken in different areas.