From wikipedia: “William Stewart, in 1965, proposed the terms acrolect and basilect as sociolinguistic labels for the upper and lower boundaries respectively of a post-creole speech continuum”….
“In certain speech communities, a continuum exists between speakers of a creole language and a related standard language. There are no discrete boundaries between the different varieties and the situation in which such a continuum exists involves considerable social stratification”.

And so:

18 different ways of rendering the phrase “I gave him one” in Guyanese English (from Bell, R.T. (1976), Sociolinguistics: Goals, Approaches, and Problems, Batsford).