In Feb–Mar of 2020, I built a another toy #StackBased #concatenative #programming #language in #clojure called "As if":
https://gitlab.com/semperos/asif
This was for a presentation on Clojure transducers, not for a serious #language implementation 🙈
I implemented it as a single call to clojure.core/transduce with the language's lex, parse, and optimize phases as transducers and its eval as a reducing function.