With the default installation of Racket you get Scribble, that is the language that is used to write the docs. (It's the same spirit of LaTeX where everything is a string unless you use a magical character, but the magical character and the details are very different.) https://docs.racket-lang.org/scribble/
Comments
Yes. Some examples:
With the default installation of Racket you get an implementation of Algol 60 https://docs.racket-lang.org/algol60/
You can download and install form the package repository the language Honu, that is a Java-like language https://docs.racket-lang.org/honu/index.html
With the default installation of Racket you get Scribble, that is the language that is used to write the docs. (It's the same spirit of LaTeX where everything is a string unless you use a magical character, but the magical character and the details are very different.) https://docs.racket-lang.org/scribble/
My favorite example: https://docs.racket-lang.org/2d/index.html