Translations of a document are not kept when used as a template

I tested it with Space template and Page template.

Steps to reproduce:

• Put the wiki in multi languages mode (I tried fr,en)
• Translate a document
• Create a new TemplateProvider, and use the doc as a Template.
• When you create a new page (or space), translations are not kept:
  • If it's a space template, it put the new doc to "Default" lang
  • If it's a page template, it keeps only the default lang (fr in my test)