Is the mention of "Reformed Egyptian" (Mormon 9:32) in the Book of Mormon, and the idea a spoken language can be written in another language (! Nephi 1:2) an anomaly?  The idea was unknown and laughable in Joseph Smith lifetime.  Since then, hundreds of examples have been found of Hebrew (or a Hebrew dialect like Aramaic) written in a form of Egyptian.  For example Papyrus Amherst 63, contains three Hebrew psalms, written in Demotic Egyptian.  This is what The Book of Mormon describes in 1 Nephi 1:2 and Moroni 9:32.  Reformed Egyptian in The Book of Mormon is not an anomaly.