Hello,
Russian signs are not allowed in the URL (they are automatically encoded to %1d, ...), therefore it is not possible to create a query string like tag?tagname=Технологии&groupid=54&clientcache=0
You can consider another solution. To use Latin translation of Cyrillic words.
You can find an example here:
http://www.webmasterworld.com/link_development/3796126.htmIf you are using these tags internally, the easiest solution might be to create some function that converts encoded signs back to Cyrillic.
Best Regards,
Ivana Tomanickova