The Financial Times – Michael Skapinker 
Years of research have established that the best time to start learning a language is in childhood. We have all noticed that while immigrant parents, however fluent they become, retain their accents and make mistakes, their children learn to talk like natives. When does this facility end? At puberty, has been the long-held view. But last year, a study by three US-based academics, including the renowned linguist Steven Pinker, found that the ability to learn another language to a high standard lasted longer than that. (more)