How to change language on games?

I have a EUR release game thats in spanish and i can't work out how to change it to english

any ideas? (sonic rush btw)

Thanks

The game is supposed to change language based on your PSP's menu language...

Ive played a mates copy of this game with no probs (besides hating it, but thats besides the point), getting Spanish is really strange.

I'm pretty sure the European and Australian releases are the same.

I double checked the PSP is in English in the settings. Perhaps they removed all other languages to rip it as small as possible?

obviously referring to a pirate copy of a game. thread closed.