For further fire on the speculation: Japanese nouns are always both singular and plural. Japanese as a language does not encode plurality. Thus if one considers Lexus to be a Japanese word the plural form being Lexus is reasonable.

Like how tsunami is never tsunamis. Or sushi is never sushis. One might argue that "eating sushi" implies multiples by the nature of sushi. Yet McDonalds sells French Fries not French Fry. Likewise we eat Potato Chips not Potato Chip. Thus in other words beyond Lexus the english language adopts the Japanese style.

Although you also need to consider that Lexus was a brand initially designed exclusively to appeal to the US market. It took over 15 years for them to launch Lexus in Japan.

Lexus is not a Japanese word.

But it's a Japanese _brand_ and that's what we're talking about.

Fun fact: There are many cars by Japanese brand, but very few car named in Japanese (lang).

> Lexi is another option, but apparently the brand name is not derived from the Latin term, so some lean towards Lexuses[2].

For what it's worth, Lexus as the plural form would even be consistent with Latin's fourth declension[0].

[0] https://en.wikipedia.org/wiki/Latin_declension#Fourth_declen...

For those who watch Alan Partridge[1], 'Lexi' would be likely to come to mind, as in one episode of the series "I'm Alan Partridge", Alan meets someone who, like him, loves his Lexus car. He looks forward to seeing two together and coins the term 'Lexi'. Creation of a faux-Latin term is very much the kind of behaviour the audience would expect.

[1] https://en.wikipedia.org/wiki/Alan_Partridge