If an infant hears two languages, at home the baby responds to both, but each one goes into a different part of the brain.
And the studies show that the ability to switch from one brain section to another allows some babies actually to perform better at certain tasks — mental dexterity brought on by a bilingual world
What I personally found fascinating was
The baby brain is mapping two different sets of circuitry,” …”One is for the first language, one for the second language
Because of the cultural diversity found within India, most Indians know atleast two languages if not more. Now we know that making our kids multi-lingual not only keeps them in touch with their roots but also makes them more intelligent !
For more information and help on how to raise bi-lingual kids, please read my post on Raising Bilingual Children
Read more about the landmark research on the effect of language at For baby, the more languages, the better