[MarkBsnr]

One explanation is that there were enough Greek scholars throughout American culture; as well, there were certainly enough Greek immigrants that could put the lie to anything that they saw.

Egyptian scholars were definitely in short supply and Joseph Smith not only had a more exotic story, there were fewer people who could possibly debunk this fabrication.

[MHGinTN]

I think you've ‘nailed it’ Mark ... a fraud needs an untranslatable, but he didn't anticipate the language would be so soon demystified and he would be exposed for the fraud he had perpetrated. Interesting that so many still work so hard to legitimize such a proved liar, peepstone divination adulterous false prophet ... it's a veritable industry!

[wagglebee]

Egyptian scholars were definitely in short supply and Joseph Smith not only had a more exotic story, there were fewer people who could possibly debunk this fabrication.

Precisely! The Rosetta Stone was only in its earliest stages of translation (and had not yet been translated into English) when Smith wrote the Book of Mormon. It is likely that someone living in rural America was even aware of the Rosetta Stone's existence, let alone its significance.