If Joseph Smith "inaccurately" translated Egyptian hieroglyphs in his Book of Abraham, does this cast doubt on his translation, the Book of Mormon?

In 1842, Joseph Smith, the founder of the Church of Jesus Christ of Latter Day Saints (LDS) acquired writings in Egyptian hieroglyphics.These writings were genuine hieroglyphs and were the bases for his translation, the Book of Abraham (see sample in Wikipedia). But, after the discovery of the Rosetta Stone, linguists ascertained that Joseph Smith's translation of the hieroglyphs was not only inaccurate, but better described as fraudulent. His hieroglyphs contained no theological information and nothing about the biblical Patriarch Abraham. Thus,the main question arises,if Joseph Smith fraudulently translated his Book of Abraham, then what is the probability that he also committed fraud in his Book of Mormon, the very centerpiece of LDS?