Yes, Melania Trump misrepresented her education, claiming a degree in architecture from the University of Ljubljana, which she attended for only one year without graduating (PolitiFact, Wikipedia).
Yes, her 2016 RNC speech plagiarized Michelle Obama's 2008 DNC speech (NYT, BBC, NPR). As First Lady, her 2018 "Be Best" initiative booklet copied an Obama-era FTC publication (NYT, Fox News).