It's more than just willingness. It's having access to the time and support structure necessary to completely learn the language from scratch. What adult can a few years sitting around speaking and listening to a language 12+ hours a day while being able to mostly ignore their native language?
Children go to schools where they are taught and socialized in the target language. They are then able to come home and watch tv, movies and listen to music all in the target culture.
There are some other confounding issues I'm not touching, but I think you're getting to the point. The issue isn't the brain so much as it is the greater systems involved.
Children go to schools where they are taught and socialized in the target language. They are then able to come home and watch tv, movies and listen to music all in the target culture.
There are some other confounding issues I'm not touching, but I think you're getting to the point. The issue isn't the brain so much as it is the greater systems involved.