One of the world's leading multilingual website platforms
...It can be used for simple sites, with many "wysiwyg" features, but is really designed to run extranet sites, such as customer portals. It also has multi-lingual features built in from the core.
Moodle language pack analyzer can be used to analyze one or more language packs against another one or more standard language packs, and show status of number of localized strings and the localized percentage.