Bunch of jerks

I’m studying Roman history, so I asked my Mexican friend if he knew the roman numeral for 100. He said “Sí,” but wouldn’t tell me the answer.

Then I asked my German friend if she would tell me what roman numeral IX means, but she said “Nein.”

Finally I asked my Japanese friend if he’d translate the Latin word altum for me, and he said “Hai,” but he never did.

It’s like, okay. You don’t want to help me, fine. But at least talk to me in English!