@NFZANMNIM What some wikipedia project does is irrelevant here.  In fact, many data projects do link to wikidata's various language names via wikidata links - that is a perfectly sensible approach.

The OSM wiki is clear: https://wiki.openstreetmap.org/wiki/Names#Transliteration .
There are a couple of languages (such as Punjabi) where there are multiple orthographies for the same words - in those cases, and in only those cases, transliteration makes sense - both versions are real, local names.
What Korean names have to do with Persian names in Vietnam I have no idea.
