What if

wasn't translated into Dutch, but produced in Dutch? Would you still prefer the English version? I guess you read books by Dutch or Flemish authors in Dutch, and you watch Dutch movies in Dutch ... so why not play a game by a Flemish studio in Dutch (or Flemish)? Just because you're accustomed to playing games in English? I can't imagine there are no good Dutch or Flemish voice-actors ...
I know a bad (or even mediocre) localization can ruin a game, and I have no problem with playing games in English, but if a German studio produces a game in German (my native tongue), I see no reason why I should buy the English version instead of the German one.
Of course, this is just a hypothetical discussion, since Larian has clearly stated there won't be a Dutch version.