Once you know a handful of different programming languages, write an interpreted language embedded in your preferred host language. It doesn't have to be fancy

Once you know a handful of different programming languages, write an interpreted language embedded in your preferred host language. It doesn't have to be fancy, I recommend using Forth or Lisp as a starting point; but write something real, do your thing. I find that most compilers are toys and replicas of existing languages on top of that, which misses the point of designing your own tool. https://github.com/codr7/gfoo https://github.com/codr7/gfoo