I want to use this script for ads in russian language, but important to have proper URLs – transliterated from cyrillic to latin:
site.com/продам-дом must be site.com/prodam-dom
You can check http://naydizdes.com/ site, it is using unmodified classibase script and its main language is russian.
Also you can purchase script and try its functionality, if you find that it is not meeting your requirement then request your money back within 60 days.