- Elaborate language learning tools like flashcards are pointless, for teaching children language.
- Pre-pubescent children are fundamentally more capable of learning languages than people beyond puberty, who will likely never be able to speak new languages without an accent.
- Children learning two languages at once learn both just as fast as children learning only one or the other.
- Being intelligent and social is not sufficient for a being to be capable of learning language. For instance, mutations in certain human genes can prevent people from ever being able to speak or understand language.
- There is a strong genetic component in the ability people have to learn languages; those with parents skilled in the task are likely to be skilled as well.
The take-home message seems to be that if you want to give a child linguistic advantages, expose them to two or more useful languages as young as possible.