Languages: Formosan (Austronesian languages on Taiwan), Sønderjysk (Denmark), Indo-Aryan languages, Dravidian languages
Fieldwork: Language documentation, endangered languages, language death
Phonology: Prosody, tone, tonogenesis, sonority
Historical linguistics: Proto-Austronesian, evolutionary phonology, sound change
Morphology: phi-features, agreement in Indo-Aryan/Dravidian verb paradigms
Syntax: parasitic gaps, V2