Kasiguranin language

Kasiguranin (Casiguranin) is a Tagalogic language that is indigenous to the Casiguran town of Aurora in the northern Philippines. It is descended from an early Tagalog dialect that had borrowed heavily from Northeastern Luzon Agta languages, and Ilocano (the dominant native language of north Aurora), Visayan languages, Bikol languages, Kapampangan, Gaddang, Itawis and Ibanag, which were spoken by settlers from other parts of the Philippines.

Dilasag, Dinapigue, Maconacon, and Divilacan are primarily Ilocano-speaking towns just to the north of Casiguran.