The reason why wordplays are significant if found in the Book of Mormon is because they are not obvious in English. Daniel C. Peterson explains:
Matt Bowen, who has a degree in Hebrew Bible from Catholic University in Washington D.C., has found similar wordplays going on in the Book of Mormon, with the names in the Book of Mormon. And that, from my point of view is extraordinarily interesting and significant because it suggests that the Book of Mormon was not written in English because the wordplays disappear in English. They don’t work, but they work if you understand what the underlying Hebrew was likely to have been based on the meaning of the name.– Daniel C. Peterson – Apologetics: What, Why and How?
In addition to the wordplays already covered, the following are also possible wordplays: Ammon, cast out and give place, Gideon, iron rod, Liahona, Mary, Mormon, Moronihah, Mosiah, Nahom, obscurity and dust, Paanchi, Zeezrom.
How would Joseph Smith have managed to include so many Hebrew wordplays into the Book of Mormon if he did not know Hebrew?