Peter TrudgillPeter Trudgill is Professor of Sociolinguistics at the University of Agder. He has carried out research on dialects of English, Norwegian, Greek, Albanian and Spanish and has written and edited more than thirty books on sociolinguistics and dialectolgy including Sociolinguistic Variation and Change (2002), A Glossary of Sociolinguistics (2003) and New Dialect Formation (2004). Read More Read Less