By eleven months, infants hold language dependent expectations of a speaker's ethnicity. The study suggests babies make connections between languages based on the individuals they encounter in their environments.
While being multilingual did not delay the onset of dementia for those at risk, nuns who spoke four or more languages were significantly less likely to develop dementia than those who spoke just one language.
Multilingual people have similar brain activation to that of bilingual people, but the activation is much more sensitive and a lot faster.
Researchers explore how bilingualism and multilingualism influence the language we dream in.