I’ve heard the English voice and it makes me wanna puke.
Hear the Japanese ones:
Like it? I found the way to get the voice pack. (I did that in other game, Granado Espada and it works fine).
Still, change at your own risk. Or at least, make a back up aright? I won’t be responsible for any errors.
To fully give credits to the owner, I’ll provide the link:
More reasons for Japanese voice:
In addition, I’ll show you the Taiwan ones:
And this AWFUL LIFELESS English version: