Unlike Cameroon English and Received Pronunciation, Cameroon Francophone English has a number of nasal and epenthetic vowels. Those nasal vowels are generally French ones, as Cameroon Francophone English is heavily influenced by that language. The epenthetic vowels found in Cameroon Francophone English as in many other non-native Englishes are difficult to explain. Part of the data analysed is drawn from past studies (Safotso 2001, 2006, 2012 & 2015; Kouega 2008). This is complemented by the oral reading of some test words by French-speaking Cameroonian undergraduate/postgraduate students and some speech gathered from debates and interventions on various national TV channels and radio stations. Results show that in Cameroon Francophone English, vowel nasalization and vowel epenthesis occur in specific positions. This paper attempts to show how they operate in that variety of English.