Fennel (a Lua VM Lisp) is lovely, and I’m happy to see it grow beyond its hobby language origins. As far as this interview goes, though, I’m surprised not to see Groovy mentioned among the early examples of languages designed to run on an existing runtime.
Lua is lovely, its Scheme in an Algol disguise.
Fennel is lovely, it puts a clojure disguise over the Algol disguise.