CAT 2025 Slot 2 VARC: The Language Left at the Door

A child born in Toronto to Tamil-speaking parents, or in Frankfurt to a Vietnamese-speaking household, typically begins life bilingual by default, absorbing the home language from birth and the surrounding national language soon after from daycare, television and the street. What linguists studying such children have found, somewhat counterintuitively, is that this early advantage is fragile rather than durable: without deliberate reinforcement, the home language — termed the heritage language in the research literature to distinguish it from a language learned later as a foreign subject — is frequently the one to erode, not the majority language, even though the heritage language was acquired first and the majority language second.

The mechanism behind this erosion is less about forgetting than about a shift in which language does the cognitive work of daily life. Once a child enters school, the majority language rapidly becomes the medium not just of instruction but of peer friendship, of arithmetic, of jokes, of the interior monologue of thought itself, and the heritage language is correspondingly pushed into a narrower domestic register, typically covering food, family and basic routines. A child can remain fully fluent in a language confined to that register while steadily losing the vocabulary needed to discuss anything more abstract in it, a pattern researchers term domain restriction. The child has not forgotten the heritage language so much as never been given occasion to grow it past a certain conversational ceiling, while the majority language has no such ceiling imposed on it at all.

Parents, understandably, experience this asymmetry as a crisis to be managed, and their responses vary widely in both strategy and success. The 'one parent, one language' approach, in which each parent consistently addresses the child in a single designated language regardless of context, has substantial evidence behind it, though its success appears to depend heavily on how much exposure to the heritage language the arrangement actually generates in absolute terms, rather than on the neatness of the rule itself. A household in which the heritage-language parent spends limited waking hours with the child, however consistent their language choice, competes poorly against a majority-language environment that operates for most of every day. Supplementary heritage-language schools, weekend or after-school programmes run by diaspora communities, show more mixed results, in part because a few hours a week is a modest countervailing force against constant immersion elsewhere, and in part because children often experience such programmes as an obligation rather than a source of the peer status that the majority language commands effortlessly at school.

What is at stake in this erosion is more than vocabulary. Heritage-language researchers increasingly frame fluency loss as a loss of access — to grandparents who may speak no other language, to extended-family conversation, to modes of humour and endearment that do not translate, and, for some speakers, to a sense of continuity between generations that a merely receptive, listening-only relationship to the language cannot fully replace. This is why the more clear-eyed advocates for heritage-language maintenance resist framing it purely as a cognitive or academic asset — the familiar claims about bilingualism sharpening executive function or aiding later foreign-language learning — and insist instead that the stakes are relational, since a grandchild who can no longer converse with a grandparent has lost something that no amount of demonstrated cognitive benefit elsewhere can be said to offset.