There's a new version (0.2-7) in extras-devel that supports cyrillic text and possibly other languages. I don't have means to test it right now, so I'd appreciate if someone with right-to-left input would test and report if it works.

PS If you have a list with special characters, the new version will not be able to read it, and it will show up empty. if you write something in qlister and click save, the old list will be overwritten. If you need the stuff (and have not clicked save) you can open your old file with a text editor (leafpad for example), it's located in "~/.qlister/listfile.txt" and copy/paste the text from there to back to qlister.