You can take a look at LanguageZh.php, which implements most stuff related to the Chinese conversion system.
If the conversion between Cyrillics and Latin is strictly one-to-one, then it should be fairly simple to support that, since most related code is already written. All we need is probably a mapping table between the Cyrillics and the Latin alphabet. If you can put the table somewhere, I can probably implement it and put up a test site fairly quickly. But since I have no knowledge with those languages, I can be wrong.