The trial version gives 3 positives so it's practically the same as the first link in sukebei page. I'm not going to be the one to tell you ehh don't worry it's safe because I would lie to you, but at the moment no one has complained about viruses so it's probably false positives but again you can buy the game if you are so paranoid
As I say, a clean file is always the same as suspicious as one with a virus because the objective of viruses is not to be detected to infect your PC, so anything you don't buy is potentially harmful to your PC because you don't know where it came from and what files have been modified.
Maybe your wish will even come true, someone buy and translate the game and you will still have the same virus problem that your antivirus detects things. it's not the first time