Siebrand Mazeland, 10/02/2017 08:48:
TLDR: if browsing a map for French wiki, and a
city only has a
Russian and
Chinese name, which one should be shown? Should the city name have
different rules from a store or a street name? ...
Hard questions, but let me remind that CLDR has data on the script and
usage level of languages:
<http://www.unicode.org/cldr/charts/latest/supplemental/language_territory_information.html>
(used by us mostly for
<https://www.mediawiki.org/wiki/ULS/FAQ#language-territory> ).
So in your example, if I were visiting the French article from Réunion,
and CLDR said that Chinese is spoken there ten times as much as Russian
(I'm inventing), this would be a factor to consider.
Nemo