The introduction of multiple language-specific sites to the SE network has brought to light the shortcoming of the current tag system: lack of support for non-English characters. Non-English characters are either silently dropped or converted to the nearest English equivalent. I propose that the system be changed to allow language-specific sites a greater degree of self-determination in the matter of tagging. Some of the affected sites are: Russian.SE, Spanish.SE, Chinese.SE, Japanese.SE, French.SE, Judaism.SE.
This question has initially been about the Russian.SE site, but seeing how other sites are affected by it I decided to broaden it.