Sometimes the fix doesn't take. Here is the troubleshooting matrix:
This error, often occurring after installing a bad translation patch, a corrupted theme, or a failed system update, renders your Vita virtually unusable. Menus become unreadable, game titles turn into hieroglyphics, and navigating to fix the problem seems impossible without seeing text. download font package psvita fix
Many community-made apps are built using assets that expect a full global font set. Sometimes the fix doesn't take