John Gibbons teaches in the Department of English Language and Literature at Hong Kong Baptist University. He is author of Code Mixing and Code Choice (1987), editor of Language and the Law (1994), and co-editor of Learning, Keeping, and Using Language (1991). He is President of the International Association of Forensic Linguists, and is on the board of the International Journal of Applied Linguistics, Forensic Linguistics and Discurso y Sociedad.