• The system must allow the tags to be translated between languages.
• When a page has a new translation, tags from the source page must be incorporated to the page.
• When a tag is added to any translation, they should also apply to all translations.

Proposed implementation

• Tag translation should be similar to content translation
• Tags must have a language associated to them, but can also be marked as "universal" (no language)
• A table to associate tags between languages should be created
• A tag from an other language affected to a page should be translated
  • If the tag was already translated, it should be swapped transparently
  • Otherwise, requires human intervention. Translator enters the translated tag, It creates a new tag, binds it to the tag translation set and swaps it on all pages containing the tag.
• Tags from foreign languages should be used as suggestions on the current page or used to search if the tag cloud on the page is not relevant enough
  • Content of the pages may differ and some tags may not apply to all translations.