u/Acceptable-Avocado79

I've finished this game twice (both DLCS only once) and have just bought the Deluxe Edition from Steam because I've decided to get the 100%, since I loved the game so much. I played the game originally on a localised copy (you know what I'm trying to say here) and was wondering if I could transfer my save from my illegitimate game to the actual Steam version? If that is possible, I was also wondering if achievements that I've already gotten would unlock - or if I would have to replay the game on NG+ cycles for the achievements to come through again.