Y'know, I had a deaf student in my class. She had an ASL interpreter, but when she came to office hours, her interpreter wasn't available. We were able to communicate just fine using paper, pencil, and writing.
I wonder if something could have been worked out with speech-to-text so they could see what the other parents were asking?
This is the sort of thing that I'm a lot more torn about, because it *is* a significant additional expense. At the same time, I would like everyone to feel welcome and learn to swim.
I would definitely consider "you can't come into swim class at all" to be discrimination, but "how much accommodation is reasonable" is a reasonable question.