Daniel Nettle received his Ph.D. in Anthropology from University College London. He is the author The Fyem Language of Northern Nigeria and Linguistic Diversity (OUP). He lives in London. Suzanne Romaine has been Merton Professor of English Language at the University of Oxford since 1984. She is the author of numerous books, including Language, Education and Development: Urban and Rural Tok Pisin in Papua New Guinea and Language in Society: An Introduction to Sociolinguistics (both by OUP). She lives in Oxford.