The only reason the NIV exists is because it is a translation into more modern English with slightly different source manuscripts.
And ANYONE has access to the manuscripts used by the NIV, NASB or KJV or NKJV versions of our Bibles.
On the other hand ... who has the source material for the Book of Mormon so that we can check the translation?
You or I can learn Koine Greek (I am actually learning it now) and read the entire New Testament in Greek.
Be careful, the lexicons out there were written by apostates using pagan references and then copy off of each others lexicons.
Modern versions of the Bible have been made from the corrupt Alexandrian sources also.