Do you have any books/online courses recommendations for learning what you just described?
https://en.wikipedia.org/wiki/Compilers:_Principles,_Techniq...
But there are also just an absolute ton of parsers out there to define a grammar and parse the language into an AST (Abstract Syntax Tree).
Once you have an AST then you can build an interpreter that runs the code directly in a JVM, or you can build a compiler that translates AST into LLVM, say.