'creole' has developed a linguistic meaning that parallels the ethnic one you may be interpreting. From Wikipedia: a stable natural language that develops from

'creole' has developed a linguistic meaning that parallels the ethnic one you may be interpreting. From Wikipedia: a stable natural language that develops from the simplifying and mixing of different languages into a new one within a fairly brief period of time: often, a pidgin evolved into a full-fledged language. I still found the comment to be a bit of a stretch with that usage.