The tyranny of observation in language classes

I had my lesson observed today. It was by a colleague I like, who 'gets' the way I teach, so it wasn't particularly nerve-wracking, but there's still that theatre about it. Do you acknowledge the observer's presence? Do you explain it to the class? Do you include them in discussions and activities?

Polyglot Paradox

Why do polyglots spend all their time talking English? Maybe that's a facetious question. After all, YouTube is full of videos entitled Polyglot Speaks 20 Languages, Two Polyglots With a Combined Number of 50 Languages Meet--You'll Never Guess What Happens Next!, and The Polyglot Baby Who Learned 5 Languages in the Womb.