Based on: The WordPress Rus filename translit plugin by fixed77. Russian filename and link (from title) translitter for WordPress.
WordPress russian filename translitter.
Набор дополнений и улучшений WordPress | Kit of additions and improvements for WordPress
Transliterate text in posts and pages from Serbian Cyrillic to Latin script. Visitor can select output script from widget.
Convert text in posts from Kazakh Cyrillic to Arabic script.
Simple ukrainian and russian translit for post/page title and uploaded files
Converts non-Latin characters to ASCII in post slugs.