RO2 will have English Language voice tracks at launch.
I hope that the English voice actors love RO themselves and do an outstanding work ^^;
Voice acting is a very important part of game/movie for me, as it goes far past "saying words and keeping the meaning" but good game/anime/movie directors make the voice a part of their characters. And dubbing is a touchy subject of love-hate with purists/people who preffer english.
Personally, I dislike english and spanish dubbing, so an option to switch between English-Original vopice would be super.