Hi User 13067368986426778,
Welcome to the Google Maps community.
Google Maps transliterates labels on the map for users so that they can understand how to pronounce a name and know what it sounds like when heard, while still being able to visibly recognise the street names, shop signs, public transport stops, etc that are written in the local script.
Obviously transliteration is not required for languages that share the same script so this is why you do not see double labels on those instances.