Human Story - How many languages do most people know?

I need to preface this by saying that this post is a little bit of a departure from the usual research-based content. Everything I say here is anecdotal, based on my own experiences living and working in four countries (The Netherlands, Nepal, Morocco, and Latvia), and should be treated as a data point of one. If you have your own experience or viewpoint on the matter, please comment and share!

I always knew, as I suspect most do, that knowledge of multiple languages is the norm, but if you don't experience it on a daily basis it can be tough to comprehend.The first time I heard four languages over one dinner table, or realized that Moroccan TV commercials switch back and forth between French and Arabic, it blew my mind.

The movie Rabat (which I watched while staying in Rabat) contains dialogue in Dutch, English, Arabic, French, and German - that was a trip for my American brain.

Brain Stuff - How does bilingualism affect the brain?

Psychology, more than most sciences, gets to make an appearance pretty frequently in popular media, and this particular notion is a favorite - that speaking multiple languages does things (these days, usually good things) to the brain. Every few months a study makes waves in the news, and like most science journalism, it usually involves hyperbolic headlines surrounding what's really an incremental advance in an ongoing and complex debate. There's definitely not a conclusive answer yet, but it still seems like too noteworthy a topic to pass up, so I'll do my best to represent the current debate.

A bilingual Hebrew-Arabic classroom in Israel