there's a user on this site who used to post a lot of answers in a language called GTB. in theory, it was a literal translation of TI-BASIC. it just did some text substitutions and became TI-BASIC. the problem was that there was no compiler anywhere on the internet, the spec was inconsistent, when the user did mention the TI-BASIC that it was equivalent to it was invariably a wrong answer for the challenge, and they once said "here's the source code for the compiler"... in another language no one could ever find a compiler for.