I just recently took a brain based seminar in which the presenter clearly stated that our brain are contstantly changing. Having that in mind the Critical Period Hypothesis claims that their is a biological timetable for language aquistion. I was able to serve a Spanish speaking mission in California for two years in which I encountered missionaries learning Spanish for the first time, and achieveing Spanish accents. As the theoriest elude to the fact that hemispheric lateralization dooms for language learning. Scovel proposes that the brain plasticity lets children learn a first and second language with a native accent before lateralization. Moyers and Scovel studies concluded that there could be a critical period on accents, but not on language as a whole. Logically it could be said that an adult should have the capacity to learn a new language far more better or faster that a child. As I remember talking to the missionaries who were learning Spanish they made the same mistakes small children made. That helps me know that language can be aquired after certain neurobiological stages are past.