Georges-Jean Pinault is professor of linguistics at the Ecole pratique des hautes etudes, Paris. Michaël Peyrot Michaël Peyrot is post-doc researcher at the University of Vienna on Tocharian and Indo-European linguistics. Birgit Anette Olsen is professor of Indo-European Linguistics at the Department of Nordic Studies and Linguistics at the University of Copenhagen, and previously leader of the five-year University of Copenhagen excellence programme Roots of Europe (20082013). She has published in particular about the Classical Armenian language and nominal word formation in Indo-European languages.