Seriously though, it's not that hard to write a scripting language. I found
(and have now subsequently lost, it seems) an article on writing a CPU
emulator in Python, starting with your own machine code, which you could
then take and write an assembly language for, and finally an interpreter to
go on top of that (I actually still have the source for it, if anyone would
be interested in building a base ten cpu emulator ;) ). If you can write an
emulator and three distinct languages for a fake piece of hardware,
shouldn't it follow that you could create a fake language for a distinct
video game?