The patch did not dub the Japanese voice acting (the original VAs remain), but given that EDF is beloved for its original voicework, this is widely seen as a positive.
For nearly a decade, English-speaking fans relied on menu guides and YouTube tutorials to navigate the Japanese text. In , a fan group known as The EDF Modding and Translation Crew (including notable contributors like F蹊 and VonHeld ) finally released a complete English patch for the original PSP ISO of Earth Defense Force 2 . earth defense force 2 psp english patch link
Health and weapon crates are identified by their icons rather than text. The patch did not dub the Japanese voice