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Kasiguranin|Kasiguranin language Wikipedia
Kasiguranin (Casiguranin) is the language of Casiguran town in the northern Philippines. It is descended from an early Tagalog dialect that had borrowed heavily from Northeastern Luzon Agta languages.
Dilasag, Dinapigue, Maconacon, and Divilacan are primarily Ilokano-speaking towns just to the north of Casiguran.