You can manually swap them using or FTP, though you must use plugins like sa0tour0 to redirect system files to ur0: safely. Custom Interface Enhancements :
To get "extra quality" (full compatibility and proper text rendering), you need two specific files provided by Sony: PS Vita System Firmware: The main operating system (currently version PSP2UPDAT.PUP (System Data): ps vita firmware font package extra quality
On the PS Vita (firmware 3.60–3.74), system fonts are stored in os0:data/font/ . A font package replaces the standard ltn0.pgf , ltn1.pgf , and Asian character sets with higher-quality alternatives. Think of it like installing a better system font on Windows or macOS. You can manually swap them using or FTP,
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