Sigh... Must you anti Mormon Cabal members lie about everything? The scripture you are referring to clearly states that it is altered and known only to them.
Mormon 9:32-34:
32 And now, behold, we have written this record according to our knowledge, in the characters which are called among us the reformed Egyptian, being handed down and altered by us, according to our manner of speech.
33 And if our plates had been sufficiently large we should have written in Hebrew; but the Hebrew hath been altered by us also; and if we could have written in Hebrew, behold, ye would have had no imperfection in our record.
34 But the Lord knoweth the things which we have written, and also that none other people knoweth our language; and because that none other people knoweth our language, therefore he hath prepared means for the interpretation thereof.
So why do you make the strawman argument that there has to be a similar written language, somewhere else? Especially when the account claims to be the only reference. That is a blatant misrepresentation in my book. Where I come from they call that lying. My sister invented her own written language for her diary so that no one else could read it. I think it was some form of shorthand but she still isn't talking.
I am more curious as to where the original Bible written in God's own hand is? What perfect language was it written in? Inquiring minds want to know? Are you going to tell me that the most important book in the world (in your mind at least) is missing? Horrors! Could it be that your book was written by goat herders after getting drunk on fermented goats milk?
Man, I would like to know why you sister thought it necessary to invent her own language to protect her private thoughts n her diary - was she protecting them from you perhaps?
And it came to pass in this year there began to be a war between the aNephites, who consisted of the Nephites and the Jacobites and the Josephites and the Zoramites; and this war was between the Nephites, and the Lamanites and the Lemuelites and the Ishmaelites.
My response is from the Book of AU.
AU 7:17-19:
17 And some of the Grande order will disputest thee with falsehoods but smiteth them back not.
18 For they are a confused and stubborn people, clinging to falsehoods and fairy tales from a charlatan.
19 Knowesth this, they maketh for good humor.