CLONE - A teacher can set a course language

This test requires a site with at least 3 language packs installed.

1. Log in as a teacher and select a preferred language which is different from the site language via Preferences in the user dropdown menu.
2. Check that the interface is displayed in the preferred language.
3. In the course settings, select a different language again for the course.
4. Check that the language for the course overrides the site and user languages.