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.

Andrey Ovcharov

Plugin sanitizes title for post slug, replacing non-Latin characters to ASCII.
Requires <a href="http://derickrethans.nl/projects.html#translit" rel="nofollow ugc"><code>PECL::Package::translit</code></a>
At the moment the supported transliteration filters include: * Cyrillic-to-Latin transliteration; * Greek-to-Latin transliteration; * Han-to-Latin transliteration; * Hebrew-to-Latin transliteration; * and filters to remove diacriticals from text.

WP Nice Slug

Converts non-Latin characters to ASCII in post slugs.

Cyr2Lat Slugs vs WP Nice Slug