How this man learned 11 languages

The BBC is carrying a story of a 21 year old lad who fluently can speak 11 languages. It's amazing, but yet possible.
BBC News - How do you become fluent in 11 languages?

Mimi naongea lugha 23 za makabila mbalimbali kasoro kinyamwezi.

Hata za mitaani nazijua

Nilisikia marehemu Papa Yohanne Paulo wa Pili aliongea lugha 72 kwa ufasaha!

Inawezekana ila si kwa ufasaha.