The author says he vibe-coded a book translation website, and there is no challenge.

Anyone who has translated a book, a literature one, knows it isn't something that is well done by AI.

Indeed; but for the author, the challenge was not to produce a good translation of anything, or to develop a good automated process for doing so. It was to bash together a website that churns out translations, without even a specified level of quality. For the author, these are all challenges of making a process to do something; not to produce any actual artifacts of quality.