When we did our first cruise with Holland America on the Koningsdam, we were quite surprised to discover there were plenty of films available dubbed to our mother tongue, Spanish. Two years later, on the Zuiderdam, all the Spanish dubbed films had dissapeared, and, by now, they haven't ever been back. It wasn't so difficult or expensive to maintain that feature for foreign passengers. If not, leaveing customers the opportunity to use of of those dongles would be a good option, IMO.