game language, does it matters?

well, i do live in japan, and i can only buy factions here in japanese, my question is if i can use the serial code to my old account normally, or if i have to buy an european version of the game, in order to be able to add the serial code to an account that is located in europe?

thanx in advance....

You should be able to add a Japanese Factions Key to your Account that was started in Europe.

If it gives you an error of some kind (It really shouldn't) - then take it up with NCSoft's website and you should get it fixed.

you can change the location for your account i believe

Thats restricted between America and Europe from our side I beleive (if your account started in euro or usa, you can only pick between euro and usa). The Asian countries are seperate.