I'd shoot a documentary in the streets around the world asking locals to mimic their interpretations of how others speak in foreign countries.
Ask a dozen generic Americans to mimic Chinese from Japanese, UK English (pick a dialect, right?), Russian, French, East Indian, Arabic.
Then go to the streets of China and ask a few generic Chinese to mimic the speech of Americans, Japanese, UK English, Russian, etc.
Goto Japan.
Goto East India.
Goto...
I want the world to see just how informed or ignorant everyone is about each other. Let them comfortably laugh at themselves and others.
And then I want to give them some fundamental natural science and geography tests.
People both fascinate and horrify me.