Actually (as far as I know anyway), very few of the cutscenes actually have voices. The majority of them are just on screen text.

What's somewhat confusing though is sometimes you get half the cutscene with voices and the 2nd half without (or vice versa), again though I don't think that's an error, I think they just don't have voices.

Perhaps they'll get added later, but I wouldn't worry about it You can also replay cutscenes (if you want) via the room in any of the inns.