User blog comment:Arden.tenjou/Explanation of the Title: "Shingeki no Kyojin"/@comment-12642484-20131230103001/@comment-50.135.65.208-20140703225744

In other words, the author and editors don't know English as well as they think they do. It's like how "Alchemist of Steel" became "Fullmetal Alchemist" at the author's insistance, despite the fact that she barely speaks English.

I think I'll write a great novel and decide what its title will be translated into when it's printed in Thailand. I don't know Thai, but I can google some words. Same idea.