Immersion tab above is here, but was missing earlier today.
Why does it sometimes go away, when it was there before.
It disappears when you enter beta courses. Go to a non-beta course and refresh the page. :)
I do beta courses, but I refresh at every language and it was in French, German and Spanish today. Odd, huh? It is back again, so I guess we may not find out.
It should only be missing from the beta courses. If that isn't the case, you'll want to send something into Support (though it'll likely be delayed due to the holidays).