If the translation is real or the record is real then the person who translated it would seek to have it published in a peer review journal. If it never makes it that far, then it is definitely a hoax.

To get into a peer review journal, the translation would need to be independantly checked for correctness. Also the circumstances of the find verified, the date of the original record checked and the original record would have to be shown.

Compare the release of "The Book of Hagoth" with the circumstances and translation of the Dead Sea Scrolls.