Ha ha. I don't kiss differently for either lead, just use a different leg. I use kissing and clucking interchangeably - either means lope, both under saddle or on the ground. Daisy also responds to the words "walk," "trot," and "canter," both under saddle and on the ground. Usually. Lol. She's very verbal. When I'm lunging, she'll also transition from walk to trot on the phrase "get up" and trot to canter on the phrase "pick it up." Though I think I taught her that accidentally by using those as encouragement while working her, ha ha.
Also, I lied. I HAVE seen that done, where they bend to the outside to ask for the correct lead. I actually saw it on RFD-TV on one of the training shows, I thought it was completely bizarre. But they were doing it on both English and Western horses, so I don't know what was going on. I thought it was really weird.