Sorry for my bad English.
What I mean it that site is full of games like " Blindness [It]" and "Ash [K]". I see that game is foreign right from the name in any list (and acting accordingly).
But Fort Boyard haven't such mention, so I suppose it's English, until check closely. But as English version currently is missing on site, maybe it worth to add [Du, Fr] in the name of the entry?