I found problems with some premium themes and with some plugins using Qtranslate. I think the best multilanguage plugin is yet to come, specially for Wordpress web development not only blog development.
The core software is built by hundreds of community volunteers, and when you’re ready for more there are thousands of plugins and themes available to transform your site into almost anything you can imagine.
I consider myself fairly versatile when it comes to O/S selection. I have used DOS/Windows PC's all my life, switched my main laptop to Mac two years ago, and have used numerous flavors of Unix/Linux/BSD while studying for my Comp.Sci. degree.