The term is correctly used

Can you specify on what basis you determine that the term is used
"correctly"?

It's true that the piloting community uses "Dutch Roll" in the way the
OP did, but the piloting community uses lots of words with implied
meanings at odds with the aerodynamic literature. This usage
interferes with their ability to gain a more sophisticated
understanding later on, due, I suppose, to the law of primacy.

I agree with Bob Moore (and Bill Kershner, et al) that Dutch Roll
shouldn't be used in this context.