Black hair has been an option since the Korean version first went live. My guess is you just didn't go through all the options. I have a KO account, a TW account, I passed on a HK account, and I'll probably be getting a JPN account when it launches there. After that The 'international' release (english) will be in the works. That is the current development plan. You don't have to know how to read anything in another language, as the MMO is VERY straight forward. So much to the point that, even for the 'kill x monster x amount of times' all you need to do is select the monster, and use the scouter to scan it, and it has a GIANT yellow/orange smile face to let you know if that is the type of monster you have to kill for the quest. There are red rings on the map to say 'hey, x objective is around in this circle area so look here!'.
To who said there are no sayians. You're right, there are NO PLAYABLE SAIYANS in the game. There ARE however, mix breeds. The 'human' race in the game, while called human, is a mixed blood race. They are a Saiyan/Human crossbreed to some level.. haven't bothered to do the math to find out what fraction over the course of 400 years though.
@Shadi, yes, you are no where near as strong. Hence why you can be ssj in the TMQ to fight Nappa and Vegeta and STILL need a full party to win. This is of course to balance the game for PvP as well as making sense that SSJ would lose a fair deal of it's power boost for being a mix breed 400 years in the future. Just like all the transformations, you need to wish for it from the dragon though, same for the giant namek and the 'pure' majin (makes you look like kid buu).
EDIT:
http://youtu.be/bwYnr8gQQVE?t=35s
35s in, black hair color option.