The Importance of Motivation in Learning Languages

I don't think it is a child gift for learning languages. If you're motivated and if you're forced to use the language anyone can learn anything any language to fluency, he says. Not all languages are created equal but there are some languages that are difficult or that are considered difficult objectively according to him. I'm not motivated to learn Chinese  but very specific languages from Papua New Guinea Indonesia in his new book "Linguistics"