Will there be an option to turn the voices off, or will they just be there?
Viewing post in Sangsue & Hana's New Outfits comments
The full game won't be voice acted. Some specific lines will be triggered the same way sound effects are triggered in dialogues, they're manually scripted into it.
It's the same voice acting system Black Isle Games used, for Planescape Torment, Baldur's Gate etc.
But no, there won't be an option to turn them off.