Can cartoons replace talking in the heritage language?

No, according to the sources read for this site, but the answer changes with age. King and Mackey in The Bilingual Edge write that for babies and toddlers, joint adult-child activities do much more to promote language learning than baby videos of any sort. For school-age children they write that you can feel comfortable using all kinds of edutainment to support second language goals. The word is support: no source read for this site shows a screen doing a parent's job.

Babies and toddlers: a screen is not a person

The American Academy of Pediatrics recommends no television at all under age two. King and Mackey quote that line, sourced to aap.org, so we hold it as REPORTED: we read their quotation, not the Academy's page.

Their review adds a study they describe (Kuhl and others). Nine-month-olds who watched high-quality videos of a native Chinese speaker learned no Chinese sounds, no better than infants with no Chinese exposure at all. Only the group with a live, interactive speaker learned anything. This is REPORTED too: their account of the study, not the study itself. It tested sounds, in infants. It does not tell us what a cartoon does for a four-year-old's vocabulary.

In the Patterson study the book describes (64 two-year-olds learning Spanish and English), how often a child was read to in a language predicted vocabulary in that language. How much television the child watched in it did not. Also REPORTED.

Ages 3 to 9: with you first, then more on their own

For ages 3 to 5, the app's guide, built on King and Mackey, says screens can help once you watch together. They call a screen at this age "an accompaniment": something to talk through, not a babysitter. Watched alone, it is still mostly passive. Their example is to pause the show, ask a simple question, and pick a "word of the week" from what you watched (pájaro, bird) to use in real life for the rest of the week.

For ages 6 to 9, the guide says the research turns more favorable. The book's example is Belgian children (REPORTED). Flemish children with heavy English-subtitled television arrived at school understanding far more English than French-speaking Belgian children with much less exposure. The gain showed up mostly in listening and reading comprehension, not in speaking.

Why understanding is not enough

Merrill Swain's 1985 study of English-speaking students in French immersion in Canada, as King and Mackey report it (REPORTED), found that heavy comprehension input without much active speaking practice produced near-native listening alongside persistent speaking errors.

A cartoon supplies input. It does not give a child a turn to speak and be answered. Putting the two findings together is a reading of ours, not a result either one states. It fits how the app's guide puts it: screens are "a strong support, not a substitute for talking with your child".

How much, and what to do at each age

For older children, the same quoted guidance is "no more than one to two hours per day of educational, nonviolent programs". This is REPORTED as well. The book is a 2006-era text, as the repo's notes describe it, and the current wording was not checked.

• Ages 0 to 2: skip heritage-language baby videos for now. The guide suggests talking toys, interactive books, songs you sing and reading aloud instead.
• Ages 3 to 5: watch together, pause for a question, and pick a word of the week.
• Ages 6 to 9: look for cartoons, DVDs or games that let you switch to the heritage language. Preview them, and pair them with something physical, such as a related toy, a food or a game.
• Ages 10 and over: treat podcasts, music, online videos and games as everyday tools, and stay involved. King and Mackey's example is a mother who allowed her daughter's usual movie only with the soundtrack in the heritage language. It became a weekend habit they shared.

In the app, this guide sits on the Today screen under "Wondering if screens, apps, or talking toys actually help?" and follows your child's age.

What is still unknown

• Language apps. The sources read for this site cover television, DVDs, computer games and talking toys. No source read for this site tests a language-learning app (UNVERIFIED).
• Whether the infant video result holds at other ages. The study as reported tested nine-month-olds and their sounds.
• How much screen time is right today. The hours above come from a 2006-era book, and no current guidance was checked.
• Whether any screen can stand in for a parent's talk. The reported gains are mostly in understanding.