The question is not what you can manage or what an individual mapper can manage. The question is what is desirable and what is not. As I said the OSM database is not a place for translations of every street name into every language. It is also a question about notability with a certain cultural sphere. A good rule of thumb is to look if there's Chinese language Wikipedia page for a certain thing, if so then one could add a name:zh for that thing to OSM also. I haven't checked but I don't think e.g. Drottningholmsvägen in Stockholm has a Chinese Wikipedia page