The Book of Mormon was etched on plates of gold with a language known as "Reformed Egyptian", a hybrid of Egyptian and Hebrew texts.
One of the reasons LDS scholars considered Mesoamerica as the ideal candidate for archaeology digs was because it was the only place in the entire North and South American Continent where written language was an established tradition. However, the only problem was that the types of languages that existed in Mesoamerica at the time didn't closely resemble Hebrew, Egyptian or Cuneiform(only script used in Tower of Babel times). The other issue is that the written language used in Mesoamerica dates all the way back to 5,000 B.C., so there is no way the written language that is found in that area is from Book of Mormon Civilizations.
LDS scholars at BYU point out that there are circumstantial similarities between Mesoamerican script with Egyptian and Hebrew texts. Native American Languages: Let's Void the Void by:Brian D. Stubbs
Wednesday, April 18, 2007