As a native French speaker, I really wish they would stop having characters speak French when it's clear that the actor does not speak any French at all. I cringe every single time, it's horrible.

I absolutely love the discussion about choosing a foreigner as Al Capone, it sounded so authentically scandinavian that I forgot it was a fake documentary. They also picked exactly the right soundtrack, there are always xylophone sounds in these quirky documentaries.