Assume we have a user who is able to translate content and edit only translation. This is possible from the policies settings:

content/translate: (Language:german)
content/edit: (Language:german)
content/publish:  (Language:german)

But the API doesn't allow him to publish the translation or edit it later without adding the main(initial) language of the content(e.g english) to the content/edit and content/publish policy list.

Step to reproduce:

• create a content in english
• create a user and assign him above policies
• try to publish the translated content

Expected:

• The user can translate, edit or publish only the content language previously assigned to him.

Acutal Result:

• User can't publish translation
• User get a list of all languages in the system when he clicks the + button in the translation tab.
• Content already available in german is not possible to be edited , due to :https://github.com/ezsystems/ezpublish-kernel/blob/master/eZ/Publish/Core/Limitation/LanguageLimitationType.php#L132