was the specific title for the Japanese PSP release, the English-language versions are functionally identical in terms of core gameplay. Core Versions & Titles Winning Eleven 10: Ubiquitous Evolution : The original Japanese PSP release (released April 2006). Pro Evolution Soccer 6 : The European/Australian English version. Winning Eleven: Pro Evolution Soccer 2007 : The North American English version. Key Gameplay Features
Even with a perfect patch, users report issues. Here is your troubleshooting guide:
There is no perfect 100% English ISO. Most patches cover 90-95% of the interface, but exhibition mode comments, some master league news, and a few menu sub-screens may remain in Japanese.
Because the original release was exclusive to Japan, the native interface and commentary are in Japanese. This has led to a robust community effort to create and distribute . WE 10 v PES 6 What are the differences? - Evo-Web