Raising bilingual kids: The science and the myths
- oops parents
- 3 days ago
- 11 min read
Updated: 19 hours ago
Welcome back to the Oops Parents blog. This week we're talking about something that comes up in almost every international parent group chat: raising kids across two, three, or even four languages. We spoke with Hande Demirtaş, a product designer who has lived in Berlin for more than a decade and is raising two bilingual children. After going with her own son's speech therapy journey and experiencing the long wait for support, Hande went on to build logoyo-mini a too designed to help multilingual children build language confidence.
Her story brought up many of the questions multilingual parents ask themselves: Are we doing this right? Is mixing languages a problem? Should each parent speak only one language? What happens when school starts? And how do you know when a child genuinely needs extra support?
So we wanted to look beyond the myths and explain what research and professional guidance actually tell us.
If you're looking for a tool to support your child's language development in Germany, you can join the waitlist at https://logoyo-mini.com/
What stuck with us from the conversation
Mixing languages is normal. A child who moves between languages in the same sentence is not necessarily confused. Code-mixing is a normal part of multilingual development.
There is no single “correct” way to raise a bilingual child. One parent, one language (OPOL) can work, but families use many different approaches successfully.
The school language can quickly become dominant. Once children spend much of their day in Kita or school, the language they hear there can become their strongest language.
Not every language is treated equally. A child's accent or home language can be received differently depending on the language, the community and the social context. This matters for confidence and belonging.
Bilingual development can look uneven. A child may understand one language better than they speak it, have a larger vocabulary in one language, or use different languages for different parts of their life.
Confidence matters. The goal isn't perfect grammar or a perfect accent. It's giving children enough safety and opportunity to communicate, experiment and make mistakes.
Myth about raising bilingual kids
The most common fear parents have is that learning two languages will confuse a child or cause a speech delay. It doesn't.
Research and professional guidance do not support the idea that exposing a child to two or more languages causes language delay or disorder. Multilingual children can develop language normally across more than one language, although their skills may be distributed differently between those languages. Imagine a child who knows 300 words in German and 200 words in your home language . Looking only at their home language vocabulary might make it seem as though they are behind compared with a monolingual child. But those 500 words are part of the child's overall linguistic experience.
A bilingual child's vocabulary is not necessarily stored neatly in one language. So when professionals assess a multilingual child, they should look at the whole language picture, rather than judging the child against monolingual expectations in just one language.
My bilingual child is mixing languages.
This is another big one.
Your child says:
“Mama, ich wolle mavi.”
Or:
“Anne, gibt benim Schuhe?”
Don't panic.
Moving between languages is called code-mixing or code-switching, and it is a normal part of multilingual communication.
Children may use the word that comes to mind most easily, follow the language being used around them, or switch because one language has the vocabulary they need at that moment. It doesn't mean their languages are getting mixed up in their heads. Children also learn surprisingly early that different people and situations call for different languages. A child might speak German at Kita, Turkish with grandparents, English with one parent and a mixture of all three at home.
That is not a failure of the system. That is the system.
OPAL (one parent, one language) or what?
Short answer: you don't have to.
The one-parent-one-language (OPOL) approach is popular because it gives children a predictable association between a person and a language. For some families, it works beautifully. But it isn't a requirement for bilingual development. Families have successfully raised bilingual and multilingual children using many different patterns:
one parent speaking two languages
both parents speaking both languages
different languages in different situations
a minority language at home and the majority language outside
grandparents or extended family providing additional language exposure
There is no magic family formula. What matters more is that children have regular, meaningful opportunities to understand and use the languages around them. And that means real interaction. Talking at the dinner table. Reading a story. Playing pretend. Singing. Cooking together. Talking to grandparents. Going to the playground. Arguing about bedtime. A language is not just something a child needs to hear. Children need opportunities to use it.
Is there a magic amount of exposure?
No.
You may see claims online that a child needs a particular percentage of exposure to each language to become bilingual. It is tempting because parents love a number they can aim for. But bilingual development doesn't work like a recipe. There is no universal percentage at which a child suddenly becomes bilingual.More meaningful exposure generally creates more opportunities for development, but children can have very different language experiences and still become multilingual.And exposure doesn't have to be perfectly balanced.
A child might spend 70% of their day in German and 30% in Turkish. Another might have an 80/20 split. Another might have one language during the week and much more of another language with family at weekends. What matters is the quality, consistency and opportunities for interaction, not achieving a perfect mathematical balance.
What happens when school starts?
This is where things often change.
Before school, a child may have spent much of their day hearing a home language. Then suddenly they are surrounded by another language for six, seven or eight hours a day. It is completely normal for the school language to become stronger. You may notice that your child:
starts answering in the school language even when you speak the home language
knows more school-related vocabulary in German
mixes languages more
understands the home language better than they speak it
prefers the majority language with siblings
starts translating for parents or grandparents
seems to “lose” some vocabulary in the home language
This doesn't necessarily mean the home language has disappeared. Children's language abilities are dynamic. The balance can change depending on who they talk to, where they live, what they are learning and which language they need most.
Understanding a language is not the same as speaking it
This is an important one for parents.
A child can understand a language very well but rarely speak it. For example, your child might understand everything their grandmother says but answer her in German. That doesn't automatically mean there is a problem. Receptive language, what a child understands, and expressive language, what a child can say, develop differently. Children may also use different languages for different purposes. They might know the words for emotions in one language, school subjects in another, and family routines in a third. So don't ask only: “How many words does my child know in Turkish?” Also ask: “What can my child understand and communicate across all of their languages?”
Is earlier better?
Earlier exposure can provide advantages, particularly because young children have enormous amounts of time for natural interaction and may find aspects of pronunciation and grammar easier to acquire. But there is no magic age after which language learning becomes impossible. Children can learn additional languages later too. Older children and adults may need more conscious learning and practice, and their pronunciation may develop differently, but that doesn't mean the opportunity is gone. So if your family hasn't managed to introduce a language from birth, don't give up because you think you've missed the window. Start where you are.
The really important distinction: language difference vs. language disorder
This is probably the most important thing we can tell multilingual parents. Being different from a monolingual child does not mean being delayed.
A multilingual child may:
mix languages
have different vocabulary sizes in each language
have an accent
prefer one language
understand more than they can say
be much stronger in the school language
temporarily use less of their home language
make grammar mistakes influenced by another language
None of these things, on their own, proves that a child has a language disorder. At the same time, bilingualism shouldn't be used as an explanation for every genuine difficulty either. A child can absolutely have a developmental language disorder while also being bilingual. The important question is whether there are persistent difficulties with communication that cannot simply be explained by the child's exposure to a particular language. That's why multilingual children should ideally be assessed with their full linguistic background in mind. If you're concerned, look for a professional who understands multilingual development rather than assuming that difficulty in the less-used language automatically means there is a disorder.
What are the actual warning signs?
Instead of worrying about every mixed sentence or grammatical mistake, pay attention to the broader picture. It is worth seeking professional advice if you notice things such as:
a child losing language skills they previously had
persistent difficulty understanding or communicating across their languages
significant difficulties that appear across the child's languages rather than only in the less-exposed language
communication difficulties that interfere substantially with everyday life
a child becoming consistently unable or unwilling to speak in particular situations
concerns raised independently by parents, educators or healthcare professionals
One important example is a child who speaks comfortably in some situations but consistently cannot speak in another, despite apparently understanding the language. That can have many possible explanations, including anxiety or selective mutism, and is something to discuss with an appropriately trained professional rather than assuming it is simply bilingual development.
What about speech therapy in Germany?
In Germany, children can receive Logopädie for a range of speech, language and communication difficulties. For multilingual children, the important thing is that the assessment takes their entire language environment into account. If a Kita, teacher or pediatrician raises a concern, it is reasonable to ask:
What exactly are you observing?
In which situations does it happen?
Does the concern appear in one language or across languages?
How does my child's communication compare with what you would expect for their age and language experience?
Does the professional have experience assessing multilingual children?
If you genuinely have concerns, don't feel that you have to choose between “ignore it because they're bilingual” and “something must be wrong.” There is a middle ground:
Take the concern seriously, but make sure the child is assessed as a multilingual child.
Keep the home language alive
Once school begins, the majority language can become incredibly powerful. This is why maintaining the home language often requires some intentional effort. You don't need to turn your home into a classroom.
Try:
reading books together
singing songs
cooking together
telling stories
talking during everyday routines
visiting family who speak the language
arranging playdates with other children who use the language
watching or listening to age-appropriate content together
letting your child hear adults having real conversations in the language
giving your child reasons to use the language, not just hear it
And don't worry if your child answers you in another language. If you continue speaking your home language naturally and positively, you are still giving them valuable exposure.
What about reading and writing?
Speaking a language and becoming literate in that language are not the same thing. A child may speak your home language fluently but only learn to read and write in German because German is the language of school. If you want your child to become biliterate, they generally need opportunities to develop literacy in the home language too.
That might mean:
reading books in the home language
writing cards or messages to relatives
drawing and labelling pictures
keeping a simple diary
visiting a library
letting grandparents read with them
making the home language part of everyday written life
It doesn't have to look like school. The goal is to show children that their home language is not just something they speak with Mum or Grandma. It is a language that belongs in books, stories, jokes, games and the wider world too.
The key for billungualism is the confidence
This might be the part that doesn't show up in developmental charts. A child can know plenty of words and still become reluctant to speak if they are constantly corrected, teased about their accent or made to feel that one of their languages is less valuable. That's why confidence matters. Instead of correcting every mistake, try responding to what your child is actually trying to communicate.
If your child says:
“Gestern, ben spielplatza gittim.”
You don't necessarily need to stop everything and say, “No, that's went.”
You can simply respond:
“Yes! You went to the park yesterday. Who did you go with?”
The conversation continues. The child gets the correct form without the interaction becoming a test. The goal isn't perfect language. The goal is communication.
The Germany specific reality
For families raising multilingual children in Germany, language development doesn't happen in a vacuum. It happens inside Kita, school, friendships, playgrounds, family relationships and a society where some languages and accents may receive very different reactions from others. That can affect how comfortable a child feels using a language.
A child may decide that German is the “school language” and another language is the “home language.” They may become embarrassed when parents speak a different language in public. They may stop wanting to speak the family language with friends. These aren't simply language-development questions. They're questions about identity, belonging and social pressure.
And this is one area where parents can't solve everything with a better language strategy.
Sometimes the most important thing we can do is make sure our children know: Your languages are not a problem to fix. They are part of who you are.
If you're worried, here's what to actually do
First, talk to your child's Kita or school teacher or pediatrician and ask what they are seeing.
Be specific. Don't just ask, “Is my child's German okay?”
Ask: “What communication difficulties are you actually observing, and when do they happen?” Then look at the whole picture. But
You don't need to panic over a language mixing or you don't need to stop speaking your home languages because someone tells you it will confuse your child. Don't stop speaking your home language because someone tells you it will “confuse” your child. But don't dismiss genuine concerns either. If something doesn't feel right, seek an assessment from a professional who understands multilingual children and can consider all of the child's languages.
The bigger picture
Raising children across languages isn't always easy. There are nursery rhymes you never grew up with. Parent-teacher conversations in a language you're still learning. Forms you don't completely understand. Grandparents who can't communicate easily with their grandchildren. Children who suddenly decide they only want to speak German. And moments when you wonder whether you're doing any of this right. But the research gives parents a reassuring message: Children are far more capable of learning multiple languages. What children need is not a perfect bilingual parenting system. They need meaningful interaction, opportunities to use their languages, support for the languages that matter to their family, and adults who don't make them feel that their multilingualism is a problem.
So keep talking.
Keep reading.
Keep singing.
Keep making space for your languages.
And let your child build their multilingual world in their own way.
Thank you!
Are you raising children across two or more languages?
What's been the hardest part and what has surprised you?
Drop a comment and let us know. And if this was useful, send it to another multilingual family who might need to hear it.
Follow @oopsparents wherever you listen or watch, and we'll see you in the next one.
Where this information comes from
This post combines the guest interview from this week's episode with research and professional guidance on multilingual child development, including:
Byers-Heinlein, K. and Lew-Williams, C., "Bilingualism in the Early Years: What the Science Says," Learning Landscapes, National Library of Medicine https://pmc.ncbi.nlm.nih.gov/articles/PMC6168212/
American Speech-Language-Hearing Association (ASHA), guidance on learning more than one language and multilingual speech and language development https://www.asha.org/public/speech/development/Learning-Two-Languages/
BBC Tiny Happy People, resources for families raising bilingual children https://www.bbc.co.uk/tiny-happy-people/articles/zj8fxbk
BBC Future, "How Speaking Other Languages Changes Your Brain" https://www.bbc.com/future/article/20220719-how-speaking-other-languages-changes-your-brain
Disclaimer
This post is for general information and orientation only. It does not constitute medical, psychological, speech-language or educational advice.Every child and family is different. Language development, access to speech therapy and educational support can also vary by location and individual circumstances. If you are concerned about your child's speech, language or communication development, speak with your pediatrician, Kita or school, or a qualified speech-language professional with experience in multilingual development. We are a community sharing research and lived experience, not clinicians providing individual diagnoses or treatment advice.
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