If I am not wrong, voice acting is a feature missing for the original MapleStory. For the sequel, MapleStory 2, Nexon has hired a team to go over this, particularly for the NPCs to give the game more “life”. It remains to be seen if the foreign language servers will be getting localized voices.
MapleStory 2 will begin its Alpha test phase from 17th September till 21st September, which is actually just next week. I am expecting Nexon to give the game a grand introduction at G-Star 2014 this December, and I can’t wait to see what other features will be announced. More info here!