They aren't really. I'm fascinated with the notion of breaking an imposed language apart and remixing it. The people of the Nation Worlds in my novel have done that, have left Earth to a place where they can make their own society. Their speech, written and spoken, reflects the reasons they've made that journey. Linguists have a term for the way I've used language in the narrative.
Caribbean speech has different modes of address.
Speakers may choose to use different modes within a sentence, flipping from a relatively standard English, French or Spanish to a more creolized form to a deep creole. It infuses meaning into the language that goes beyond its content. Caribbean writers have been writing in fluid modes of address for years. Sometimes the text needed the poetic rhythms of Trinidadian stylings, sometimes those of English standard. When he used what seemed to suit each situation best, the work flowed.