According to the traditional account, when Joseph Smith translated the gold plates into what is now known as the Book of Mormon, he did not create the text himself or copy the text from another existing manuscript. Rather, he translated the text through an interpreting device, which only worked when Joseph was spiritually and emotionally prepared. The article supports this claim by including several stories of the translation process as told by eyewitnesses.
BYU ScholarsArchive Citation
Peterson, Daniel C.
"A Response: "What the Manuscripts and the Eyewitnesses Tell Us about the Translation of the Book of Mormon","
Journal of Book of Mormon Studies: Vol. 11
, Article 9.
Available at: https://scholarsarchive.byu.edu/jbms/vol11/iss2/9