Re-tell Lecture — Language

Read the lecture ONCE, then re-tell it in your own words in 40 seconds without looking back. How children acquire language Children acquire their first language at a speed and ease that no adult learner can match. By the age of three, most children can produce complex sentences, ask questions, and express ideas about the past and future. Linguist Noam Chomsky argued that this rapid acquisition is possible because humans are born with an innate language faculty — a set of grammatical principles hardwired into the brain. This would explain why children everywhere pass through the same developmental stages in roughly the same order, regardless of the language they are learning. An alternative view, championed by usage-based linguists, holds that children learn language through social interaction and statistical pattern recognition, without needing an innate grammar module. They hear thousands of sentences every day and gradually extract rules from the patterns they detect. Both theories agree on one point: there appears to be a critical period for language acquisition, after which learning becomes significantly harder, as demonstrated by the rare cases of children raised without exposure to language.

Read the lecture ONCE, then re-tell it in your own words in 40 seconds without looking back. Why languages die Of the roughly seven thousand languages spoken in the world today, linguists estimate that nearly half will disappear by the end of this century. A language dies when its last fluent speakers pass away without transmitting it to the next generation. This typically happens when a dominant language — often English, Mandarin, or Spanish — offers economic and social advantages that make parents choose to raise their children in that language instead. Globalisation and urbanisation accelerate the process: young people move to cities where the local minority language is not spoken, and they adopt the majority language of the workplace. Each language lost represents a unique way of understanding and describing the world, including knowledge about local ecosystems, medicinal plants, and cultural practices accumulated over centuries. Linguists document endangered languages by recording speakers and creating dictionaries and grammars, but documentation alone cannot save a language. Revitalisation requires community commitment: schools that teach in the language, media that use it, and social environments where speaking it is valued rather than stigmatised.

Read the lecture ONCE, then re-tell it in your own words in 40 seconds without looking back. The cognitive benefits of bilingualism Growing up speaking two languages produces measurable changes in brain structure and cognitive function. Bilingual individuals constantly manage two language systems: even when speaking one language, the other remains active and must be suppressed. This lifelong practice of managing interference strengthens executive function — the set of mental skills that includes working memory, attention control, and the ability to switch between tasks. Studies have found that bilingual children outperform monolingual peers on tasks requiring conflict resolution, such as the Stroop test, in which participants must name the colour of ink used to print a word that spells a different colour. The benefits extend into old age: research suggests that bilingualism delays the onset of dementia symptoms by an average of four to five years, not by preventing the underlying brain changes but by building a cognitive reserve that compensates for them. However, these findings are debated. Some researchers argue that the bilingual advantage is smaller than initially reported and may reflect other factors, such as socioeconomic status or immigration-related resilience, rather than bilingualism itself.