People who speak two languages are twice as likely as those who only speak one to regain normal cognitive function after a stroke, according to a new study. In recent years it has become clear that life experiences modify the way disease expresses itself in the brain, said lead author Dr. Suvarna Alladi, a neurology professor at Nizam’s Institute of Medical Sciences in Hyderabad, India. “One study in Toronto demonstrated that people who could spe…