These are mostly server changes that should make it more stable (read: many new bugs added

). One of the changes should make NPCs better in English language (at least theoretically).
Better wait for the client update. There are several new features, some good and others not that good. Like NPC labels that change color when the NPC is dead, or fixes to the sound system (combat music that was playing forever), or less lag, or labels that you see only when less than 10 meters away.