It's just a regional thing. Neither is correct or wrong. You may as well yell at a french person that the word is "cheese", not "formage". From the very articl

It's just a regional thing. Neither is correct or wrong. You may as well yell at a french person that the word is "cheese", not "formage". From the very article you linked: > In English, the noun mathematics takes a singular verb. It is often shortened to maths or, in North America, math.