LinguaPlone aims to be *the* multilingual/translation solution for Plone, and achieves this by being as transparent as possible and by minimizing the impact for existing applications and Plone itself. . It utilizes Archetypes references to do the translation, and all content is left intact both on install and uninstall - thus, it will not disrupt your content structure in any way. It also works with WebDAV and FTP. . LinguaPlone doesn't require a particular hierarchy of content, and will work with any layout of your content space.
