One thing to keep in mind here: the KJV is still under copyright in the UK (and possibly other members of the Commonwealth). It's safe to use in other countries

One thing to keep in mind here: the KJV is still under copyright in the UK (and possibly other members of the Commonwealth). It's safe to use in other countries, but not there (although I gather it's rarely enforced). While copyrights for most things in the UK expire after a time, the same as other countries, that historically has not been true for works produced under the aegis of the Crown. In the case of the KJV, King James paid for the translation, so it falls under Crown Copyright. As the saying goes, "It's good to be the King". I think some Crown Copyright works are going to fall out of copyright in 2040, but I'm not sure if that includes the KJV.