第25期 · 外语学习该从幼儿园开始吗

The question of when to introduce a foreign language into a child's education might seem, at first glance, a matter of administrative scheduling — a curriculum decision of interest only to pedagogues and policymakers. In reality, it touches on one of the most intriguing findings in cognitive neuroscience: the observation that the young brain possesses an extraordinary, and transient, capacity for acquiring language that diminishes steadily with age. I strongly agree that foreign language education should begin in kindergarten, not because earlier is always better in some crude sense, but because the window of maximal neural plasticity, once closed, cannot be reopened by even the most diligent secondary school instruction. Skeptics of early language instruction raise legitimate practical concerns. Kindergarten classrooms, they argue, are already overstretched, tasked with teaching social skills, emotional regulation, and basic literacy in a few short hours each day. Adding a foreign language, particularly in schools serving disadvantaged communities where resources are already scarce, risks producing shallow, performative language exposure rather than meaningful acquisition. There is also the question of interference: some developmental psychologists warn that introducing a second language before a child has mastered the first may impede literacy development in both. A child who confuses 'b' and 'd' in English may struggle still more when confronting a different alphabet or writing system simultaneously. These are not trivial objections, and they deserve serious engagement rather than dismissal. The scientific case for early language learning, however, is overwhelming. Decades of research on the 'critical period hypothesis' have demonstrated that children exposed to a second language before the age of seven consistently achieve native-like pronunciation, grammatical intuition, and pragmatic fluency that older learners almost never attain, regardless of effort or instruction quality. This is not a matter of intelligence or motivation; it reflects a structural reality of brain development. In early childhood, the brain's neural pathways for language are still being formed, and a second language can be woven into the same neural architecture as the first, creating genuine bilingualism rather than translated thinking. Finland and Sweden, where second-language instruction begins at age six, consistently produce among the highest English proficiency rates in the world among non-native speakers. Crucially, recent studies have laid to rest the interference fear: properly designed bilingual programmes, far from impeding first-language development, have been shown to enhance executive function — the cognitive skills that govern attention, working memory, and self-control. The child who learns two languages does not learn half as much in each; rather, they develop a more agile, better-equipped cognitive system overall. In conclusion, the argument for beginning foreign language instruction in kindergarten rests not on fashion or ambition but on biology. The brain of a five-year-old is uniquely receptive to linguistic input in ways that the brain of a twelve-year-old simply is not, and no amount of later teaching can fully compensate for that lost decade. The practical challenges — curriculum crowding, teacher shortages, the risk of shallow exposure — are real but surmountable, requiring investment and thoughtful programme design rather than capitulation to the status quo. To defer language learning to secondary school is to bet against the evidence of neuroscience, the experience of high-performing education systems, and, ultimately, against children's own extraordinary capacity to absorb what the world offers them, if only we offer it early enough.