This is about learning languages and presenting a multitude of languages, rather than about linguistics, so Language Log isn’t there, for example.
It’s also a bit of a mystery that Tim Ferriss’s blog made the list on account of one sole post: How to Learn (But Not Master) Any Language in 1 Hour (Plus: A Favor).
My favourite tip on language learning from that post is that you get translations in a given language of sentences like ‘The apple is red’ and ‘It is John’s apple’, work out how many obstacles the language presents in comparison with your own (including pronunciation), and then if there are too many obstacles, you just don’t learn the language. This would have saved me a long time with Turkish. But on the other hand, it presupposes elements like subject, object, verb and noun cases (why Ferriss puts off learning Russian!).
People love discussing how to learn languages. Probably the root of machine translation is here.