Matchpoints. J♠ lead, result 3NT+2.
This was an odd occurrence at a local club a couple of nights ago. South was, ridiculously, attempting to be politically correct when announcing 2♣ as "Stayperson". East's first language was not English, but he claimed that he spoke enough to recognise "Stayman" and would have chanced a double if he had known it was that. South thought he could have doubled anyway, but East said that he did not know what 2♣ was and did not want to give UI by asking. As you can see 3NT fails on a club lead.
How do you rule?