As of right now there are multiple versions of Tera; NA, Europe, Taiwan, Japanese and Korean. NA is accessible but you need to bypass the login block (via the launcher) explained in a few pages back by one of the users. This works and I tried it myself although the latency is worst than what you'll get at EU, fluctuating from 250ms to 350ms (atm Europe pings anywhere from 200ms to 290ms). There's Europe which blocks newly created accounts from Malaysia (and other Asian countries) after May 2013, so your only choice is either playing from somewhere else or buying an existing account. Taiwan is difficult for a  self-explanatory reason and is ways behind in patches and updates. The other two are standard; blocked regions outside their own, etcetera.