I have installed the SeoGlossary one month ago. It's easy to install and good features. It does not have multi-language support but you can very easily convert the language file to your language. It worked fine with me.
The support is also good. Specail thanks to Tristian. They also have a good ticketing system where you can follow-up the tickets, do not need to handle over e-mails.
This was what I need and I got it!