The instructions went to print in the second week of October... so long past a correction I'm afraid.

Hopefully someone at Hasbro was double-checking, but I was told that the instructions section was already translated (because it didn't need a fan to translate) so wasn't part of the project.
From what I was told, they only wanted the bio section written up in English because that was something the people in the office couldn't do, so had asked for a long-term fan to do it for them.

If that is true, then it was a Hasbro employee who is responsible for the error.