ArenaNet has announced that they will be updating Guild Wars over the next few weeks to allow players in various language districts to travel to different language districts.
As part of our goal of supporting global player interaction, we are making changes to the Territory and District user interface. As of later today, players in Korean language districts can travel between American, European, and Korean districts. Players in Japanese and Taiwanese language districts will be able to travel to the other language districts following a subsequent game update in the coming weeks. The end result is that players in any language district will be able to travel to any other language district within Guild Wars. We will continue to offer International Districts as an additional location for players to meet one another.
Read more here.