Marriott authored syndicated articles appearing in some 200 English-language newspapers and magazines throughout the world. He was a regular guest writer in several Jamaican newspaper publications."Louis Marriott's columns delightful", Jamaica Gleaner. Marriott speaks on linguistics. He wrote and produced numerous radio and television plays and documentary broadcast programmes and films in both Jamaica and Britain. He wrote The University of Brixton radio drama series for BBC English Radio 1970–71. He wrote several public education radio series for the CFNI (Caribbean Food and Nutrition Institute) during his freelance years.
