From the Language Police Blotter
What is the plural of “Prius”? Many people I know say “Prii,” but a professional writer friend, who knows about language, insists that because “Prius” is not actually a Latin word, it has to be “Priuses.”
In the movie The Social Network, Mark Zuckerberg’s antagonists are known as “the Winklevii” although they certainly were not Latin. Strictly speaking, I suppose, they should have been known as the Winklevossen. Maybe the idea is that in the same way you can pick your name, you can pick your plural.
That would mean that it would be Toyota’s call. What’s yours?
UPDATE: I recall a Saturday Night Live sketch from the late 70’s, in which Dan Aykroyd and John Belushi played the “Elvii”: Aykroyd was the classic Elvis, and Belushi was “Elvis after he discovered carbohydrates.” Now, as it turns out, “Elvii” is pretty much the language on the street when you have multiple Elvis impersonators. That would speak in favor of “Prii.”