Inagta Alabat (Alabat Island Agta) is a Philippine Negrito language spoken in central Alabat Island, Philippines. Its speakers began arriving on the island in the 1970s but originated from Villa Espina in Lopez, with earlier settlements in Gumaca and perhaps other towns. (Lobel, Alpay, Barreno and Barreno 2020) Predating the Agta on Alabat Island were communities of individuals self-identifying as "dumagat" but who now only speak Tagalog as a native language. Less than a dozen individuals can still speak the Inagta Alabat language whether on Alabat Island, where it is being lost in favor of Tagalog, or in Lopez, where it is being replaced by the language of the Manide who have migrated to the area in large numbers and intermarried with the Agta. Those Agta who can still speak the Inagta language in Lopez speak the same language as the Agta who have migrated to Alabat over the past 50 years. Other Agta in Lopez either speak only Manide, or a mixture of Manide and Inagta Alabat-Lopez.

Inagta Alabat forms a subgroup with Manide.^[2] The extinct Katabangan may have also been related.^[3]

Selected Inagta Lopenze words from Salipande (2022):^[4]