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Social FactorsLanguage VariationAmerican EnglishVarieties of EnglishBrazilian PortugueseLinguistic VariationQuantitative AnalysisStylistic VariationAcoustic AnalysisAfrican American EnglishCanadian EnglishDialectVowel ShiftAfrican American Vernacular EnglishRegional VariationVariationist AnalysisSociolinguistic VariablesBritish EnglishNative SpeakersDialect Contact