Would I go about creating a programming language

Interesting article.

I've been designing my own language for the past year and a half: https://letlang.dev

I feel like the phase 2 of the design is very long, longer every time I have a question like:

  - how would I do this?
  - does this syntax make sense with the rest of the language?
  - is this feature really useful? how would it be used?

As for the compiler, I've often started to write the parser for an ever-changing syntax, while the AST did not change that much.

Now, I use a different approach: I write the AST and then the compiling/transpiling/interpreting phase. This allows me to make unit tests and make sure things work the way I intend it to. The parser will be the last piece of the puzzle.

After 1 year and a half, I just began writing the compiler, and I expect to switch between implementation and design quite often as I encounter road blocks. I'm also expecting to cut some features to get a first MVP out, but the AST will be there.