Racket has nice features to implement languages.
This is very useful, for a programmer should allow his/her users to speak or write in their own languages. I was aware of this
already
some 50 years ago when writing systems for quantum mechanical calculations (NB using fortran, not an easy tool to implement a new language).
However, I see packages that implement languages for Racket programmers.
For example fluent: ~> syntax and infix notation
(I must admit that I did the same some times, what in my humble opinion is a mistake).
I think Racket programmers should talk or write Racket.
I think for a student learning Racket or any language alike,
it takes little effort to get acquainted with prefix notation and parentheses.
For myself this notation is very helpful for it avoids mistakes with regard to precedence rules.
Furthermore, the DrRacket GUI provides very nice tools to check parentheses.
(and much more)
JMHO, Jos