What is the silent period in bilingual toddlers? An SLP unpacks the research, the timeline, and what to do (and not do) when your child goes quiet.
A few months after starting a new English-only preschool, a Spanish-dominant 3-year-old goes nearly silent. Not just in Spanish — in both languages. Parents call. “She used to talk all the time. Now she barely speaks at school, and her Spanish at home is regressing too. What happened?”
What happened, in most cases, is the silent period — one of the most well-documented and most misunderstood phases of bilingual development. Here is what it is, how long it usually lasts, and what to do (and crucially, what not to do) when your toddler is in it.
The silent period is a phase that bilingual children — especially those acquiring a new second language after their first is somewhat established — go through during which their productive output in the new language drops dramatically, and sometimes drops in their first language too.
The child has not stopped learning. Quite the opposite. They are in an intense receptive-input phase: listening, processing, mapping, comparing. The brain is doing massive work to figure out the new language’s sound system, grammar, and rhythms. Output is paused while the input is reorganized.
This was described by researchers such as Muriel Saville-Troike, whose study of young second-language learners framed it as language development that has “gone underground” into private speech, and by Patton O. Tabors in One Child, Two Languages (1997), still the standard reference.
Two things deserve precision here, because parenting articles tend to flatten them. The silent period is common but not universal — a sizeable number of children never show a clear one. And when it does happen, its length varies enormously between children. Anyone quoting you a confident average is overstating what the research supports.
The honest answer is weeks to months, usually under six. Tabors’ observations put the nonverbal period at shorter than six months in most children, and often considerably shorter — some studies of young second-language learners have found averages of only a few weeks, alongside a range stretching to several months. A number of children skip it entirely.
I’m deliberately not giving you a tidy average, because the research doesn’t support one. What it supports is this: a quiet stretch measured in weeks to a handful of months is expected, and the useful question is not “how long” but “is it still only the new language, and is the child otherwise engaged?”
Key variables that affect length:
This is the most important section.
For the broader context on speech delay vs. bilingual difference, see our speech delay vs. bilingual difference post.
A few common patterns parents describe:
The single most common mistake parents and teachers make is requesting performance. “Say hello in English.” “Tell the teacher what you want.” This pressure prolongs the silent period because it associates the new language with anxiety. Let the speech come when it comes.
Don’t cut the first language. The child’s silent period in the new language is being processed through their first language. Cutting Spanish to “help with English” actually slows English acquisition.
Birthday parties, doctor visits, family gatherings — situations where the child is asked to perform language in front of an audience — can be hard during the silent period. Reduce these temporarily if you can, or coach the child gently. “You don’t have to talk. Just stand by Mama.”
Read aloud more. Sing more. Narrate more. The brain is hungry for input right now. Feed it.
Most children come out of it well inside six months. Watch for the small signs of breaking out: a whispered word to a friend, an unprompted Spanish phrase from a child who’s been mostly silent, a response to a question that used to get a shrug.
The silent period is normal. There are still scenarios where worry is appropriate:
If you’re seeing concerning patterns, the right move is a bilingual evaluation — not a monolingual one. See our working with monolingual speech therapists post and our bilingual development for children with speech and language differences post.
The silent period is described in the second-language acquisition literature as a normal stage, not a warning sign — Tabors’ One Child, Two Languages is the standard reference, and it frames the quiet stretch as part of how a young child takes on a new language rather than a failure to.
What that means in practice for your family:
In other words: the silence is usually productive. What it isn’t is a diagnosis, in either direction — if something feels off to you, a bilingual evaluation is the way to find out, not a blog post.
If your toddler’s teacher is concerned about silence, you can share this language:
“Lucia is in what’s called the silent period — a normal phase of bilingual development where children go quiet in their new language while their brain processes the input. It typically lasts a few weeks to several months. She’ll start speaking when her brain has mapped enough English to feel safe attempting it. The best thing is to keep speaking to her warmly and not require performance.”
For the deeper guidance on these conversations, see our when your toddler’s teacher doesn’t speak Spanish post.
Some children come out of the silent period as expressive bilinguals (they speak both languages comfortably). Others come out as receptive bilinguals (they understand both but mostly speak one). Both are normal. See our receptive vs. expressive bilingualism post for the full picture.
If your child is in the silent period, the most supportive thing you can do is keep the home language rich and consistent. The 12-month curriculum sequences daily Spanish exposure across routines so the input stays steady. For free, start with our Spanish phrase cards.
Some children come out of the silent period as expressive bilinguals (they speak both languages comfortably). Others come out as receptive bilinguals (they understand both but mostly speak one). Both are normal. See our receptive vs. expressive bilingualism post for the full picture.
Shyness is a temperament; silent period is a developmental phase tied to language acquisition. If your child was previously verbal in their first language and the quiet coincides with new-language exposure, it’s almost certainly the silent period. Shy children tend to be quiet in both languages all along; silent-period children get specifically quiet around the new language.
If it’s been less than 4 months since the start of English-only school and your child still speaks freely at home in Spanish, that’s a textbook at-school silent period. Wait it out.
A small amount, yes — a labeled photo of the family, a favorite bilingual book in the cubby. Don’t overdo it. The bridge is mostly built at home.
Worth a check-in with a bilingual SLP. This could still be normal (some kids emerge slowly), but at 6 months and counting, you want professional eyes on the situation.
Sometimes, briefly. Children moving from a Spanish-only home environment into an English-dominant school can occasionally show a temporary quiet in Spanish while they’re loading English. The first language usually rebounds within a few weeks if it’s supported at home.
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