Common Lisp, and even more so Racket, has reader macros. With a little help from LLMs you might be able to get a Ruby-like language that translates into Lisp.

As a last resort look at Racket's "Rhombus" language, it's basically an infix, Python-like syntax on top of Racket. You can use that or see how they pull it off and add Ruby constructs to it.