It is a postcolonial variety of English, long in use in the territory (Southern Cameroons, now the northwest of the republic). Over the years, it has developed characteristic features, particularly in lexis but also in phonology and grammar. Those characteristics were once regarded as errors but are now increasingly accepted as distinctive Cameroonian contributions to the English language.
The phonemes ɔː/, ʌ/ and ɒ/ tend to merge to ɔː/, making "cot", "caught" and "cut" homophones. Similarly, "lock" and "luck" are pronounced alike. And "white-collar worker" sometimes becomes "white-colour worker" in Cameroon.