If only it was that simple. In Ireland, in both Derry/Londonderry and Dingle/An Daingean, there are 3 names in 2 languages, and all are to some extent in use. In Ukraine, some streets that might have officially been called one thing a few months ago are now called something else following the Russian invasion. In Italy, in some places there have been OSM name disputes about “how official” some signposts are. I could go on; there are plenty of other examples.