If you'd like to get started with the Japanese version, I can help you by: for you Explaining the stat icons for weapons
The English patch is a fan-made creation and is not officially endorsed by the game's developers or publishers. Use at your own risk. earth defense force 2 psp english patch link
This is the gold standard for fan translations. If it isn't listed there, a public patch likely doesn't exist. If you'd like to get started with the