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plural acrolects
(sociolinguistics) The variety of speech that is considered most suitable for formal occasions (typically using only standard forms). quotations examples
In one dimension change is directed toward the acrolect, the “typical” change in the creole continuum.
1994, Michael Montgomery, The Crucible of Carolina, University of Georgia Press, page 60
At the other end of the continuum is the most standard speech, the acrolect. In between is a gradient of forms with many successive levels, the mesolects.
2013, Allan Bell, The Guidebook to Sociolinguistics, John Wiley & Sons, page 83