I wasn’t familiar with what code-switching is and had to look it up. I had the same view initially that she had just changed her tone, but according to the Wikipedias, “In popular usage and in sociolinguistic study, the term code-switching is frequently used to refer to switching among dialects, styles or registers.” Her speech significantly changed register so I think it would count as code-switching.
It really is! It kind of makes me wish I had studied linguistics.
