Well, Norvig's (et. al.) JScheme - http://norvig.com/jscheme.html http://norvig.com/jscheme.html - is implemented in Java - partially, and then a bunch of core

Well, Norvig's (et. al.) JScheme - http://norvig.com/jscheme.html http://norvig.com/jscheme.html - is implemented in Java - partially, and then a bunch of core functions are written in JScheme itself. Or, if you look at implementations of J... like this - https://code.jsoftware.com/wiki/Essays/Incunabulum https://code.jsoftware.com/wiki/Essays/Incunabulum - it's basically creates something closer to J in C and then writes the rest of the interpreter. If you squint hard enough...