We can’t guarantee compatibility with 3rd party plugins. If it causes the site to “break” it isn’t compatible however there are thousands of plugins out there, some with similar functionality so there’s probably one which will work for you.
I have successfully implemented 5 languages on the Avisio theme via WPML.
Out of the box the plugin will allow you to translate all your pages and posts. The custom posts “portfolios” and “sliders” won’t work out of the box, but I have changed the code of the theme so that it all works perfectly. Took about 30 hours of work, but was worth it. You can see the results at: http://macdoctor.lu … It speaks 5 languages :-)