Russian

[vicefi]

This script don't work in Russian letters

Yes, I can too confirm that the plugin doesn't work with Cyrillic(Bulgarian, Russian, etc.).

[MrStepson]

The issue is related to regular expression /\W\b/ that is used to find beginings of words. This expression doesn't work with non-Latin characters. Try to change it to /[^A-Za-z0-9_\u0410-\u044f][A-Za-z0-9_\u0410-\u044f]+/. Also please note that your html-file with cyrillic text should be saved as Unicode.