This is a known limitation of the current plugin. Either disable the plugin before launching problematic games, or accept that you'll need to reboot without plugins when serious gaming is your priority. Since the plugin only affects system font rendering and not saved data or game progress, there's no long-term harm even if crashes occur.
Yes, but they must be converted. Many top font packages available in the homebrew community come pre-converted into the .pvf format. If you download a custom package, ensure it specifically states it is configured for the PS Vita to avoid formatting glitches. Where to Find the Top PS Vita Font Packages download font package psvita top
: A common tool used to swap system fonts. You place your desired ux0:data/font/ and use the FontInstaller VPK to apply them. Manual Replacement : Custom fonts are often renamed to and placed in sa0:data/font/pvf/ You typically need a plugin like to modify this directory safely. Custom Themes Manager This is a known limitation of the current plugin