He has carried out linguistic fieldwork in Britain, Greece and Norway, and has lectured in most European countries, Canada, the United States, Colombia, Australia, New Zealand, India, Thailand, Hong Kong, Fiji, Malawi and Japan.
Trudgill is one of the first to apply Labovian sociolinguistic methodology in the UK,[5][6] and to provide a framework for studying dialect contact phenomena.
[7] He has carried out studies on rhoticity in English and tracked trends in British rock music for decades, including the Beatles' decreased pronunciation of /r/s over the course of the 1960s.
[8][9] He was a member of the committee for England and Wales for the Atlas Linguarum Europae in the 1970s, doing some research on the East Anglian sites.
[10] Trudgill is also the author of Chapter 1 ("The Meanings of Words Should Not be Allowed to Vary or Change") of the popular linguistics book "Language Myths" that he co-edited.