Over the past two decades, Taylor Swift has categorized her music, relationships and style in eras. But researchers have found another thing that Swift seems to change often — and that is the way she speaks.

Matthew Winn, an audiology professor at the University of Minnesota Twin Cities, and his student, Miski Mohamed, co-authored a study that analyzes Swift's dialect and accent from 2008 to 2019. For several years, they listened to old Swift interviews, focusing primarily on her time in Nashville and New York City, and found that her vowel pronunciation had significantly changed over time. These changes in Swift's dialect coincided with her gradual transition from country music to pop sensation.

"She's been recorded so often for interviews over the course of her career that we have th

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