To modify firmware fonts, your PS Vita must be running custom firmware (CFW). Ensure you have the following ready:

: You can manually replace system fonts in sa0:data/font/pvf/ using an FTP client or VitaShell, though this requires caution to avoid system errors. PS Vita System Software (US)

Installing font packages on your PS Vita typically involves:

emulator to correctly render on-screen text and user interface elements. While the standard console update file handles core system logic, the font package—often a secondary download named PSP2UPDAT.PUP

A: No, changing the system font should have zero effect on your game saves, data, or the performance of games and apps. It's purely a visual customization.

If you are looking to change the fonts on a physical modded PS Vita:

From time to time, Sony has released official firmware updates for the PS Vita, which may include changes to the font packages used by the system. These updates are aimed at improving the device's stability, security, and functionality.

The PS Vita's default font is functional but unremarkable. For many in the homebrew scene, the motivation to change it goes beyond mere aesthetics. It’s largely driven by practical issues with software compatibility and language support.

overwrite the files in vs0:data/font/pvf/ directly unless you have a recovery menu. The "top" method is always rePatch redirection.