The slowest part of bringing in a game from another part of the globe is always the localization, but Tree of Savior
has apparently taken care of that ahead of time
. The most recent testing session for the game featured an option to switch the game's language between English, Korean, and Japanese, changing both text and dialogue.
It's unclear at this point whether this is going to be an option within the game's client in all regions, but that decision may be left up to regional publishers; all current test servers are located in Korea, since that's where the game is being developed. Still, it's an encouraging sign for those hoping to see the game on American shores sooner rather than later