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The rise of the idea of an American English - Ingrid Paulsen, The Emergence of American English as a Discursive Variety: Tracing Enregisterment Processes in Nineteenth-Century U.S. Newspapers. Berlin: Language Science Press, 2022. Pp. vi+450. eBook open access, ISBN: 978-3-96110-338-6
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Matthew J. Gordon (2024) studied this question.
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