Whats the authority for Japanese speaking peoples or Chichewa?
Did the command to take the Gospel to the world end with the apostles? I don't think it did.
So what do we English speaking people take to the world?
What do our brothers in the UK take to the world, and what did they take to the world in the past?
We take what we have from God. So what version of the Word of God do we take to the world?
The KJVO folks will tell you we should take the KJV to the world, and some are doing that.
I say the same message of the Gospel is found in the most modern versions.
Our church supports missionaries in several countries around the world, they use the KJV to teach from.