Since Permalinks that contain Cyrillic may cause problems on some server setups, this plugin will work around this problem by updating the automatic Post Slug generation code. In this way, posts which have a title in Cyrillic will have permlinks transliterated in Latin characters.

Cyr2Lat Slugs

Converts Cyrillic letters in post slugs to human-readable Latin phonetic equivalent.

Anton Lukin

Simple and fast plugin for Russian-language blog. Converts cyrillic characters in posts, pages, terms and file names. 
Declension of nouns in Russian dates. Recommended to use for all fresh-installed Russian-speaking audience sites.
You can contribute this plugin on <a href="https://github.com/antonlukin/rus-package" rel="nofollow ugc">Github</a>.

Rus Package

Snippets for Russian-language blog. Cyrillic to Latin converation in slugs and declension of nouns in dates.

Cyr2Lat Slugs vs Rus Package