I’m a trainer at a gym (not personal, more like a group thing), it can be tough and there’s pressure to get the words out faster since there’s a timed aspect to the workout. Most don’t care and will be patient with you, but you’ll definitely get the bad apple every now and then that’ll mock you or make fun of you. Just gotta stay professional about it. Maybe it’ll be different in a 1 on 1 environment, but that’s my experience.