This question already has an answer here:
(1) Is there a name for this type of construction in English?
"We can't go, can we?"
"I am here, aren't I?"
"We mustn't get ahead of ourselves, must we?"
"You are going, aren't you?"
The basic construction involves making a statement, and then asking the negation. So is there a name for this?
(2) Is this construction unique to English?