>>75Watching Laoshu50500 is fucking incredible, but after a while you realise that what he's doing isn't that difficult if you dedicate enough time to it. He can have a basic conversation in about 50 languages, is pretty conversant in about 20 languages and is fluent in Mandarin, Cantonese, Japanese, Taiwanese, Korean and Somali.
He is a stay at home dad, though. So it's pretty easy for him to study.