Toyota has been conducting a poll to determine the plural of “Prius.” Will it be Priuses? Will it be the Latin-inspired Prii? Should Prius be like deer, using its singular as its plural? Or how about ...

Antain Mac Lochlainn explains ‘weak’ and ‘strong’ plurals and how to identify them. You might remember that we had another look at how numerals work in Irish a few weeks back. We could spend a long ...

Editor’s Note: This article previously appeared in a different format as part of The Atlantic’s Notes section, retired in 2021. This afternoon, a reader emailed to say that he believed I was muddling ...