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The science behind RootED

Backed by research, built by parents

Research across several decades points to the same ideas about how children learn language. Here is how we turned them into stories.

A girl daydreams over a picture book with Sprout and Wiggles, surrounded by thought bubbles of greetings in Farsi, Hindi and Mandarin, a brain, a heart and the globe

Research brief · October 2026

What research found, and what RootED does about it

Studies cited below show associations. They do not promise outcomes for any one child.

Key takeaways

Children learn the language they hear most.

Toddlers’ proficiency in each language tracks how much of it they hear. More minutes of the home language in the day is the lever.

Two languages do not confuse children.

Hearing two languages adds one alongside the other. Stories in your language sit beside English, not instead of it.

The home language fades by the third generation unless something holds it.

English tends to become the main home language by the grandchildren’s generation. Daily listening keeps your language in the mix before that shift.

  1. Finding 1 · Trust

    Children learn the language they hear most.

    RootED: short stories that fit the time you already have.

    Place & Hoff (2011), Child Development

  2. Finding 2 · Trust

    Two languages don’t confuse children.

    RootED: your language alongside English, not instead of it.

    Hoff et al. (2012), Journal of Child Language

  3. Finding 3 · Identity

    Heritage language goes with closer families and stronger identity.

    RootED: stories built around your family’s own people and traditions.

    Tseng & Fuligni (2000); Oh & Fuligni (2010)

  4. Finding 4 · Identity

    By the third generation, English usually takes over at home.

    RootED: daily listening, before that shift happens.

    Alba, Logan, Lutz & Stults (2002), Demography

  5. Finding 5 · Connection

    Lose the language, and families lose things to talk about.

    RootED: every story ends with something to ask on the next call.

    Wong Fillmore (1991), Early Childhood Research Quarterly

Our method

Two ways we look after every story

Method

Words that come back

Short audio stories reuse a vocabulary curriculum, so words return at spaced intervals and in context, inside stories rather than drills.

People

Checked by a person

A native speaker checks the language and the cultural details before your child hears them.

See the values behind the research