It seems like Java223 Scripting can, in theory at least: Code search results · GitHub
I’ve tried installing Java223 Scripting both on my dev and production installations, but it doesn’t show up under /rest/transformations/services. I don’t have any other scripting languages installed either, so I can’t compare, and maybe there are problems with my installations that prevent it from working. But, I’m pretty sure that if a scripting language is “correctly implemented”, it should show up.