I have a stutter and I’ve had several different cashiering jobs. You kinda say the same thing over and over again “hello how are you” type of thing and I know the more I repeat something the less I stutter. I also know some people, me included stutter less when they use some sort of accent. To me my customer service voice is sort of an accent. You will stutter, all of my customers have been nice and never commented on it and my coworkers have been great about it as well.