I like to think that I know a smattering of many languages, but this guy makes me look like a monoglot! (Hat-tip: John Wells’s phonetic blog.)
I’m particularly impressed with his intonation, which means many of the languages sound very good although some individual words are wrong.
It would be interesting to know how much preparation he put into this. I would definitely do much better if I spent some hours writing down a script than if I just switched on the camera and said something in twenty languages.
Perhaps I should try some day, just to see how well I could do it.