Probably already got, am not sure about it. Maybe can check youtube if people has posted the video on it.

Man, but if require to hack the Vita, possibly can be done to my PS TV

For me, I feel that it is quite silly to buy the whole game sometimes just to have english text compared to the previous one which have japanese/chinese or vice-versa. But as it has been pointed out by a forumer, there is a lot of work to be done and licenses involved which made it impossible to simply buy a game and download language pack. So sadly, there's still no viable option other than the one you mentioned previously.

Hahaha, lucky you. I'm always lazy to learn languages.

You could help and do translations for the games and post it on the internet you know.