His research centres on issues in language documentation, description, and revitalization, with a special focus on the creation and application of permanent, accessible collections of language resources (corpora). For the past twenty years, he has been involved with community-based language documentation, education, and revitalization efforts, most extensively in partnership with speakers of Plautdietsch, the traditional language of the Dutch-Russian Mennonites, and with Dene communities in Alberta and Yukon.