Casiguran Dumagat Agta
Casiguran Dumagat Agta, also known as Dumagat Agta or Casiguran Agta, is an Aeta language of the northern Philippines. It is spoken by around 610 speakers, most of whom live in the San Ildefonso Peninsula, across the bay from Casiguran, Aurora.
The language was first documented in 1937 by Christian missionaries, and since then has been continually documented by SIL linguists like Thomas and Janet Headland. A New Testament translation was published in 1979, called Bigu a Tipan: I mahusay a baheta para ta panahun tam. Among the Aeta languages, Casiguran Dumagat Agta has been one of the most extensively studied varieties.
Casiguran Dumagat is close to Paranan. A dialect called Nagtipunan Agta was discovered by Jason Lobel and Laura Robinson in Nagtipunan, Quirino. Nagtipunan is influenced by the regional language, Ilokano, while Casiguran Dumagat is influenced by Tagalog and Kasiguranin.
Casiguran Dumagat has eight to ten vowel sounds, compared to the usual four in most Philippine languages.
