Voice acting is a big project. We do not know whether it is still a work in progress or has even started yet.
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What I meant was, Voice acting is a project that the Devs. are planning to do in the future. They said that they will mostly focus on the main story and not so much on the side story that doesn't cost any impact to the main storyline. Side story will most likely to be left with no voice acting. These are their words if I'm not wrong.