What you need to understand is that cdprojekt was basically a barely functioning, very new studio over 20 years ago when they made the first Witcher. Foreign markets weren’t a focus. The game was made with Poland in mind - especially because nobody outside of Poland even heard of the Witcher then. In Poland, it was the best selling game of all time when it came out. That’s why the acting is wooden in english - it just isn’t the market it was made for.