My recent formal linguistic research is centered around paradigm gaps of defective verbs. I just published an analysis of French defective verbs, where the gaps are explained by phonological conditions constraining the insertion of verbs in generative rules of conjugation. The approach suits both morpheme and non-morpheme-based frameworks. My student Elena Kulinich is currently investigating the conditions on the gaps of Russian defective verbs.

In historical linguistics, I am especially interested in the dialectology of North American varieties of French and Creole, particularly Quebec and Louisiana. I have shown in a couple of publications that there exist pre-Acadian features in Louisiana French, some of which that may even trace their origins to Quebec. Recently, some students and I have conducted a survey of Saguenay French within the Phonologie du français contemporain project. Currently, I am investigating lexical diffusion phenomena in the linguistic atlases of Quebec.