I have enabled the multilingual content and content translation modules. I have set both the Course and Lesson content types to "Multilingual support - Enabled, with translation". The permissions look like they are set correctly for Administrator to administer the translations. I am expecting that when I edit a Course or Lesson that is in English, I will see a translation tab that will allow me to add translations for the enabled languages. I don't see such a tab. What am I missing here? Thanks for the help.
Re: Translation tab missing.
Thanks for your feedback.
You're right, it's a theme issue, we replaced the default toolbar (view - edit - translate) by the Opigno toolbar that contains an edit button but no translate button.
We will consider it for a next release (https://www.drupal.org/node/2527698)
In the meantime, the best is to do like you describe, by entering manually the url
Next / BAck Button disappeared in Activities