If your game file is a regional variant (like the Japanese Aoki Samurai no Chousen ) or a highly compressed "rip," you may need a community-made patch or a pre-patched ISO.
Various archive and community sites host versions that are already set to English. You can find "Multi-Euro" versions of PES 2014 for PSP on Internet Archive , which typically include English, French, and Italian. pes 2014 psp english language patch link
Real kits and logos for teams like Dortmund and the full Bundesliga, which were missing in the stock version. If your game file is a regional variant