Li Wei is Professor of Applied Linguistics at Birkbeck, University of London. He is editor of the International Journal of Bilingualism and author/editor of numerous books and articles, including Three Generations, Two Languages, One Family (1994), The Bilingualism Reader (2000), and Language Learning and Teaching as Social Inter-Action (2007, with Zhu Hua, P. Seedhouse and V. Cook).

Melissa Moyer is Associate Professor of English Linguistics at the Universitat Autonoma de Barcelona. Her current research and publications are concerned with migration and the management of multilingualism. She is author of the award winning book La carcel de las palabras: Ensayo sobre el lenguaje y la desigualdad social (1988, with J. M. de Miguel).