We still need to work on SITH, but at least Perplexity AI understands there were two separate sets of plates that Joseph translated.
https://www.perplexity.ai/search/how-many-sets-of-plates-did-jo-MNleUGssR0.L35LU06oUcQ
Historical accounts suggest the translation process for the Book of Mormon involved Joseph Smith using seer stones and dictating the text to scribes14. Smith would put a seer stone in his hat, place his face in the hat to exclude the light, and then read off the characters as he claimed to see them2. The scribe would repeat the words back as they were written, and if they were correct, the stone would change to the next word or line of text2. The gold plates were not used during the translation process2.
There were two sets of plates translated5:
These plates contained an abridgment of the large plates of Nephi5. Joseph Smith translated all of these plates (except the sealed portion) in Harmony, PA, with Oliver Cowdery as the scribe5.
A messenger brought the Small Plates of Nephi from the repository in the Hill Cumorah to Fayette, NY5. Joseph then translated 1 Nephi through Words of Mormon5.
Some accounts indicate that the Urim and Thummim were used for the first part of the translation, but after the loss of the original manuscript, Smith used a small, dark-colored stone1. Still, the Lord states that Joseph Smith translated by the means of the Urim and Thummim7.
The accounts vary, but a common description is that Joseph Smith placed his seer stone in a hat, stuck his face in the hat, and read off the characters as he claimed to see them2. Some believe the process differed slightly from scribe to scribe4.