A story on BBC news 24 reports - Being bilingual 'protects brain'
Being fluent in two languages may help to keep the brain sharper for longer, a study suggests. Researchers from York University in Canada carried out tests on 104 people between the ages of 30 and 88.
They found that those who were fluent in two languages rather than just one were sharper mentally.
Writing in the journal of Psychology and Ageing, they said being bilingual may protect against mental decline in old age.