Catrin Norrby is Professor of Scandinavian Languages at Stockholm University, Sweden, and Principal Fellow in the School of Languages and Linguistics at The University of Melbourne. She has published several monographs, edited books, textbooks and articles in the areas of sociolinguistics, discourse analysis and second language acquisition. She is co-author of Language and Human Relations: Styles of Address in Contemporary Language (2009).

John Hajek is Professor of Italian and Director of the Research Unit for Multilingualism and Cross-cultural Communication (RUMACCC) in the School of Languages and Linguistics at The University of Melbourne. He is also founding president of the Languages and Cultures Network for Australian Universities (LCNAU).