PES 2014 on the PSP was often localized with specific regions in mind, meaning menus, player names, and commentary might not be in English by default. An English patch or a properly configured "Option File" helps by:
This is where the English language patch comes in. A dedicated community of fans has created a patch that translates the game's text, menu options, and commentary into English, making it possible for players to enjoy PES 2014 on PSP in their native language. pes 2014 psp english language patch
This is the easiest method and does not require modifying the game's ISO. PES 2014 on the PSP was often localized
Tools like UMDGen allow you to open the ISO and replace the original language files with the new English versions. This is the easiest method and does not
How do I change the language displayed in-game? - KONAMI Games
: You typically need a patching tool (like xDelta) to apply the patch file to your original ISO image.