Matt Roper et. al argue that The Book of Mormon's language shows distinct voices and is not stylistically similar to 19th century pseudo-biblical literature.
Matt Roper and Paul Fields, "Scriptural Style in Early Nineteenth Century American Literature," 2014 FAIR Mormon Conference, fairlatterdaysaints.org, accessed July 9, 2025
We conclude then, on these four dimensions of the King James style: non-contextual words; archaic words, structure of the language, the unusual words that are used; distinguishing phrases; and the content topic–the Book of Mormon is more similar to the King James style than either The American Revolution or The Late War. In fact The American Revolution and The Late War are similar to the King James style only in a contorted pseudo-biblical exaggerated caricaturation of the two. So, if Joseph Smith was “influenced” by those books, his imitation of the King James style was better than theirs. Joseph Smith was either a literary genius, or a prophet, and we are all free to take our pick.
Our overall conclusion using appropriate statistical techniques: the Book of Mormon’s four main authors can easily be distinguished between each other. The Book of Mormon is more substantially similar to the King James style in our four dimensions than to either of those two proposed comparisons.