This is not just conjecture. We have actual evidence that Joseph Smith was lying to Mormons when he invented his new "scripture," the Book of Abraham. This is proof that Mormonism is not true. The book of Abraham was not translated, it was fabricated. Here is the evidence.
Share this video so that more people can be set free from the tangled lies of Joseph Smith. Mormons are the victims of Mormonism and we can show them love by showing them the truth so they can put faith in Jesus for real.

LINKS
Great site with support for claims about the Book of Abraham:
https://mit.irr.org/category/book-of-abraham

Article outlining some of these facts:
https://coldcasechristianity.com/writings/how-the-book-of-abraham-exposes-the-false-nature-of-mormonism/

This is the article I quoted from on the official LDS website:
https://www.churchofjesuschrist.org/study/manual/gospel-topics-essays/translation-and-historicity-of-the-book-of-abraham?lang=eng