[Koshkin]

To be fair, the parent is not talking about the editor but rather its configuration language. Indeed, there have been attempts to replace elisp with other languages, such as Scheme (guile) and Common Lisp.

[mindcrime]

There is apparently a Guile enabled version of Emacs available.

https://www.emacswiki.org/emacs/GuileEmacs

https://www.emacswiki.org/emacs/GuileEmacsBuild