6. Changes in neurological processing

Brain imaging techniques, such as fMRIs, have shown that multilingual brains tend to activate the linguistic portion of their brains even when not engaged in linguistic tasks. This leads researchers to believe that the brain’s ability to connect skills tends to enhance cognitive function over time.

Studies show that multilingual people have a higher density of grey matter in their brains, and older bilingual people usually have better-maintained white matter, even late in life