Compiler is, and will always be, the general term for source-to-source translation. I believe a transpiler is especially for source-to-source translations wher

Compiler is, and will always be, the general term for source-to-source translation. I believe a transpiler is especially for source-to-source translations where the source and target have the same abstraction level. For example, Python's tool 2to3 could be called a transpiler. Therefore, you would not use the term "transpiler" for something like Typescript to LLVM IR (if it exists).