Last Ranker

[LunaMoo]

The text displays fine so either the game is using psp font, or you're using some game breaking fan made patch(or both;p).
In first case you will have to dump original sony's font from your psp, it's illegal to distribute that font, so don't ask, for same reason ppsspp comes with free font which unfortunately looks incorrect in most games that do use it(not that many).
In second, just live with it until/if ever author of the patch fixes it or revert the patch/play unpatched original copy of the game.