From newborns babies can learn to discern between two languages if you have previously heard them in the womb. This means that during the first years of life your brain develops with greater flexibility, is better "trained" and that bilingual children have a greater capacity for learning.
Researchers at the University of Washington have found that the brains of bilingual children remain more open and longer for language learning than that of monolinguals, in addition to improving other abilities such as enriching speech skills, favoring decisions, self-control and problem solving.
This is because the brain connections are different in monolingual and bilingual babies during their first year of life. Therefore, being exposed to two languages from so young contributes to the brain presenting cognitive advantages. Having heard before and for a longer time the language presents a greater vocabulary later.
Contrary to what may be regretted, that bilingualism creates confusion in the baby's brain, being exposed to two languages is a great mental exercise. If the child mixes words when he begins to speak, it does not mean that he is confused, but quite the opposite: he is developing strong language skills.
Therefore, experts recommend a series of tips for educators and families, such as children experiencing the mother tongue (or whatever it is in each case) in everyday situations of daily life such as play, food or reading, as well as in other actions they like.
It is also important to rely on books, rhymes, word games and songs in the mother tongue with children, through which vocabulary development is reinforced, preparing them to learn to read and talk naturally in any language.
They also recommend using many different words when talking with children so that they can internalize the two languages as soon as possible.
