Never attribute to malice what can be explained by incompetence. Someone probably didn't know to translate "sexy party dress" or something like that.
A proper translation company would cost a lot more, sure, but the results would be orders of magnitude better.
This is somewhat similar to the way money is spent on making movies. Pennies are saved during the writing process, and millions wasted on stars, locations, special effects, to shoot pointless scenes in stories that make no sense.
I believe that's not incompetence but risk aversion. They're deathly afraid of trying anything that deviates from the norm because they will lose money if they don't make something that makes all focus groups happy.