Certain parties have brought up in a report that this translation project may constitute piracy.
In my book, this is a rather grey area. I hold in high regard, those that would volunteer their time to make available a game to an audience that would otherwise be unable to enjoy it.
This site does not appear to neither reveal any method of playing the game without first purchasing the original media disc, nor make it any easier to play a pirated version. As such, I leave it to the hands of Nintendo and their fully capable legal department to decide whether or not they wish to cease (and desist) such activity.

As this current topic of discussion is in a grey area of legality, I trust that everyone will take care while discussing it.