globalize2

An extension by Aissac that allows you to translate site content in Radiant CMS using the Globalize2 Rails Plugin. Provides the ability to translate your pages (title, slug, breadcrumb, description, keywords), snippets and layouts using the Radiant admin interface. You have Radius tags for accessing the locales and translations and the possibility to completely delete the translation for a page.

Check out a screencast presenting the extension and one addressing some compatibility issues