As described in the specifications:

Scenario 1: When a content item has 1 translation
Given that I have a content item ‘Why we love NYC’
AND the content item has only 1 translation i.e. English (United Kingdom)
AND I have permission to Edit the content item
When I click the ‘Edit’ icon in the Action toolbar
Then I will be navigated to the content item editing screen
AND I will see a message at the top of the page ‘Editing – Blog post in English (United Kingdom)’
i.e. ‘Editing - %content_type_name% in %language_name%’

In the action bar (content / view), when the user clicks on the Edit button, he / she should only see a list of languages if the content item has multiple translation.

If there is only one translation, clicking on Edit should redirect to the content / edit interface.