New in version 0.5.
Moses is Free software for machine translation (MT). Moses is a statistical machine translation system that allows you to automatically train translation models for any language pair. All you need is a collection of translated texts (parallel corpus).
The Virtaal plugin provides the Moses machine translation output as suggestions. Read on the Moses website how to get a Moses server running, and configure the settings in your tm.ini file.
Remember that the suggestions from the Moses plugin are unreviewed machine-generated translations, that could be wrong, inaccurate, or flawed in some other way. It is meant as a way to help you increase your productivity, not to substitute the expertise of a human translator.