Comment by whattheheckheck

The only language that needs to be designed is a Just-In-Time declarative DSL for the domain you're building for in a way that the users will understand it and be able to express precisely the degrees of freedom they need. Goodluck getting an llm to find that and you cant give up and give them a general purpose programming language to build it themselves.

Then build something that compiles that declarative spec to orthodox programming languages.