Three Puzzles for Phonological Theory in Philippine Minority Languages

This squib describes three theoretically challenging phonological processes found in the Manide, Inagta Alabat, and Umiray Dumaget languages spoken on the large northern Philippine island of Luzon. These three well-documented processes do not conform to current theoretical expectations about what is a likely or even a possible diachronic process, although each is part of a larger, complex context of sound change which does conform to theoretical expectation. A brief background survey of vocalic changes triggered by voiced stops is given, followed by the puzzling changes that depart from this more general pattern.