If I can implement it as an AST Walking interpreter, Have the syntax be lisp, and leverage most of the runtime of the language I write it in I could produce som

If I can implement it as an AST Walking interpreter, Have the syntax be lisp, and leverage most of the runtime of the language I write it in I could produce something in a week and probably teach them to use it for some definition of use as well. Would it be polished? no. Would it have really good well defined semantics for everything that I might want it to? no. But within those constraints I could probably do it.