More than half of the world's population speaks at least two languages. For a long time, however, was viewed with . In the early twentieth century, some researchers even claimed that learning two languages confused children and slowed their development.
Modern research tells a very different story. Because bilingual people constantly have to choose which language to use and the other, their brains get regular practice at controlling attention. Several studies suggest that bilinguals are better at switching between tasks and ignoring , although scientists still debate how large these advantages really are.
Perhaps the most findings relate to . Research in Canada and India has found that bilingual people who develop tend to show several years later than people with the same condition. Speaking two languages does not prevent the disease, but it may help the brain damage for longer.
The benefits are not only for those who grow up bilingual. Learning a language as an adult also challenges the brain in useful ways, and of course it opens doors to new cultures, friendships and career opportunities. So if you are reading this text in your second language, congratulations — your brain is getting an excellent .