Brain plasticity supports bilingualism

Between six months and five years, young children can absorb sounds from multiple languages without confusion or delay. This period of brain plasticity is crucial for the ease of early bilingualism, as noted by a neuroscientist from the Universitat de Barcelona in October 2026.

Infants detect speech patterns early

The auditory perception of infants is at its peak in the earliest months of life. From birth, the nervous system processes surrounding speech, detecting regularities in ambient sound even before the baby has spoken any words.

Babies distinguish complex sounds

Around six months, babies distinguish a variety of phonetic contrasts, including sounds not present in their immediate environment. At this age, a baby's auditory perception surpasses that of a monolingual adult.

Language focus narrows with age

As the child grows, their perception focuses on the phonemes of their environment. Useless contrasts gradually fade, and by five years old, the child has retained the sound categories specific to the languages they hear daily.

Bilingualism does not delay speech

Many parents fear that simultaneous exposure to two languages may delay speech development. However, neuroscience research supports early bilingualism, showing that bilingual children adapt their speech to each interlocutor.

Code alternation shows competence

The alternation between two languages in the same sentence reflects a competence, not a deficiency. Occasional mixing of words sometimes occurs but is part of normal development and does not hinder vocabulary acquisition.