He writes and teaches on ethnolinguistics, language endangerment, visual anthropology, digital archives and fieldwork methodology, and is a regular BBC presenter on issues of linguistic diversity and language endangerment. He also directs both the World Oral Literature Project, an urgent global initiative to document and make accessible endangered oral literatures before they disappear without record, and the Digital Himalaya Project, a platform to make multi-media resources from the Himalayan region widely available online.