Quote:
My question is: Is this made up language a source-to-source compiler, or is it an interpreter?
Neither. It's a programming language.
A compiler is a program that transforms code from one language to another (for example, C to Assembler). An interpreter is a program that performs instructions written in a programming language (without requiring compilation). You don't have any of these yet for your language: at best, all you have is a language specification.
After creating a full language specification (rather than just one command), it's still up to you whether you create an interpreter or compiler (and another developer could always decide to create the other one, starting from your language specification). A language doesn't have the property "interpreted" or "compiled", but your
implementation does.