This is definitely a pie-in-the-sky DARPA challenge that would be great to have around as we migrate away from legacy systems, however, even taking your functions/methods in one language and giving them to ChatGPT and asking it to translate your method to a different language generally doesn't work. Asking ChatGPT the initial problem you're trying to solve, works more frequently, but still generally doesn't work. You still need to do a lot of tinkering and thinking to get even basic things to work that it outputs.