Steps to reproduce
- Create the new user group.
- Create the new user within the new group.
- Create the new role, assign to it group created in the previous step.
- Add all content permissions (*select every single one, don't use content/all permission).
- Add user/login and section/view permissions to be able to log in and see content.
- As administrator add content translations.
- Log in as a new user created in step 2.
- Try to remove translation.
You won't be able to remove content.