Applying a patch to a physical cartridge is not worth the effort. I know you want to keep things legal but a flashcard, modified DSi or 3DS, or emulation are your best bets. That or an English European copy which are usually cheaper.
Can someone explain to me how "HTTP servers" work? I tried googling it but didn't understand. Is it for streaming livestreams to your vita? or streaming for example, a pc screen to it?