But another part of what the article says is that "Korean to English" translators might be plenty, but "Korean to Spanish" translators are rarer and won't work

But another part of what the article says is that "Korean to English" translators might be plenty, but "Korean to Spanish" translators are rarer and won't work for whatever wages a media translation firm is willing to pay. So, you get a "Korean to English" translator who translates the script to english ("pivoting") and then an "English to Spanish" translator who translates the english 'pivot' to Spanish. As you can imagine or as you might have observed from doing Google translates, this ends up with a poor result.