Just going off of Wikipedia[1], "A source-to-source compiler translates between programming languages that operate at approximately the same level of abstractio

Just going off of Wikipedia[1], "A source-to-source compiler translates between programming languages that operate at approximately the same level of abstraction", so at least by that definition, you probably shouldn't call it a "transpiler" if you're compiling from dynamic-typed code to static-typed code. I view "transpiler" as a recent informal term to be a little more precise/honest when describing compilers targeting JS, but not one that people should feel obligated to use in place of the more generic term "compiler". [1] https://en.wikipedia.org/wiki/Source-to-source_compiler https://en.wikipedia.org/wiki/Source-to-source_compiler