So, it's probably true that Melania didn't write her plagiarized speech. After all, Donald didn't write his books. The scary thing is, he really seems to believe that he did. He didn't write one word of "The Art of the Deal"--not one word.
His ghostwriter Tony Schwartz spoke to the New Yorker and said the following in an interview...
“I put lipstick on a pig,” he said. “I feel a deep sense of remorse that I contributed to presenting Trump in a way that brought him wider attention and made him more appealing than he is.” He went on, “I genuinely believe that if Trump wins and gets the nuclear codes there is an excellent possibility it will lead to the end of civilization.”