right

You're making too much of this. "Right" is just being used to request confirmation. For example, one could ask "That's ten of each sort?" In spoken English, the question is implicit in the inflection when one speaks. In written English, it is implicit in the use of the question mark. "Right" is simply an intensifier which emphasizes that one is asking a question.

"I take a left here to get to Bromley, right?"

"You said to get a quart of milk, right?"

"You're just joking, right?"

OK, i see what you're asking. The answer is yes, right can be used that way.

"You take a left here to get to Bromley, don't you?"

"You said to get a quart of milk, didn't you?"

"You're just joking, aren't you?"

Thank you~~