Can anyone suggest a CMS able to offer the following features:
- Free/open source
- Support for multiple languages (both frontend and backend)
- Support for translating content (i.e. an article can have 1+ translations)
- Support for different content types, namely pages, articles (timestamped, with comments) and image (galleries).
- Support for basic categorization (just a level of sections is sufficient)
- Support for media management (localizable image galleries)
- User friendly
- lightweight and fast
- PHP or Ruby based
- mature enough
Personally, I can only think of Drupal 6, but it's quite an overkill for what I want to do, and localization is not working 100%. I basically can live with anything which was built from the ground up with localization in mind.