Language is one of humanity’s most powerful tools. Our ability to communicate, read, and write shapes our identity, our culture, and even our way of thinking. But how does the brain acquire and process language? What happens in our brains when we learn to read or when we are bilingual?
Modern neuroscience has begun to reveal the fascinating processes that occur in the brain during language acquisition and literacy. Experts like neuroscientist Maryanne Wolf and French researcher Stanislas Dehaene, along with studies on bilingualism such as those by Albert Costa, have shown that learning language and reading are not just cultural skills, but also processes that profoundly transform the structure of the brain.
Language: A Natural Function of the Brain
Unlike reading, oral language is a natural capacity of the human brain. People are born with neuronal structures predisposed to acquire spoken language. Babies, anywhere in the world, are capable of learning any language they are exposed to in their first years of life.
This happens because the brain has specific circuits, genetically determined, to process sounds, identify speech patterns, and produce language. It is a universal process that occurs as long as the child is exposed to language during critical periods of brain development.
Reading: A Cultural Invention That Changes the Brain
In contrast, reading is not a natural function of the brain. As neuroscientist Maryanne Wolf explains, reading is a very recent invention in human history—it is only about 5,000 to 6,000 years old—a period too short for evolution to have designed brain circuits specialized in this skill.
Therefore, to learn to read, the brain needs to “recycle” and reorganize pre-existing neuronal structures that were originally intended for other functions, such as face recognition or the perception of visual objects.
Three Neuroscientific Principles in Learning to Read
Dr. Wolf identifies three key principles that the brain follows when learning to read:
- Reorganization: The brain reconfigures its neuronal connections. Specifically, areas that were dedicated to processing visual information—like recognizing faces—begin to participate in decoding letters and words.
- Recycling: Neurons originally intended for visual tasks (faces, objects, patterns) are reused to identify letters, spellings, and written language structures. This is why visual support is so important in early reading learning.
- Automaticity: As neurons work together repeatedly, they become more efficient. This allows reading to move from being a slow and demanding task to an automatic, fluid, and fast skill.
Why Learning to Read is a Challenge
Since reading is not innate, the process of learning to read depends heavily on the environment. A child who grows up in a home where there are books, where stories are told, and reading is promoted, will have a brain better prepared to perform the necessary recycling and reorganization.
Conversely, children who are not regularly exposed to texts face a greater challenge. This highlights the importance of the role of parents, educators, and the community in general in supporting the development of literacy.
Bilingualism: A Gym for the Brain
Bilingualism represents an extra challenge for the brain, but also an enormous benefit. Back in the 1970s, neurosurgeon Wilder Penfield argued that the bilingual brain is superior in several aspects, something that neuroscience has confirmed today.
Bilingual people develop more robust cognitive skills, such as:
- Greater cognitive flexibility
- Better problem-solving ability
- More efficient working memory
- Greater ability to focus attention and filter out distractions
This occurs because the bilingual brain must constantly manage two (or more) linguistic systems, activating one while inhibiting the other, which strengthens the brain’s executive functions.
Different Languages, Different Brains
Dr. Maryanne Wolf points out that while the human brain has universal structures, the way it organizes itself for reading depends on the writing system of each language. For example:
- Languages like Spanish, Italian, or German, which have a very direct relationship between letters and sounds, facilitate the construction of simpler neuronal circuits for reading.
- Languages like English or French, which have more irregular spellings, require more complex circuits and greater use of memory.
- Languages like Chinese, which is logographic and has more than 5,000 characters, activate the visual cortex in both hemispheres more intensely.
This means that a bilingual brain learning, for example, English and Chinese, develops different brain circuits for each language.
The Montessori Connection: Sensitive Periods for Language and Reading
Maria Montessori’s theory of sensitive periods aligns perfectly with current neuroscientific findings. Montessori identified a sensitive period for language acquisition and literacy that occurs before the age of six. During this period, children show a great interest in words, symbols, and understanding the written world around them.
However, even in Montessori environments rich in materials and linguistic experiences, not all children acquire reading at the same pace. Neuroscience explains why: brain plasticity is mediated by both genetic predisposition and environmental experiences (the so-called “ambiome”). Therefore, although there is a window of opportunity, the speed and depth with which each child learns depend on multiple factors.
Conclusion: A Call to Parents and Educators
Understanding how the brain acquires language and literacy has profound implications for education. It teaches us that:
- Reading is not automatic: it requires explicit teaching, guidance, and lots of exposure.
- Bilingualism is a huge gift for children’s cognitive development.
- Every brain is unique, shaped by its genetics and its environment.
As educators, families, and society, we have the responsibility to create environments rich in language, literacy, conversation, and meaningful experiences that accompany the human brain in this wonderful adventure of learning and growing.
