When they mix languages in the same sentence
3 min read
«Mummy, look at the mariposa.» Many bilingual families get scared right here: do I correct them?, are they getting muddled? Breathe. Mixing languages —what experts call code-switching— is normal, expected and not a problem. Let us look at what to do in the moment.
Why they mix (and why it is a good sign)
When your child drops a word from one language into a sentence in the other, it is almost always because that word is more to hand in that moment: they learned it there first, or use it more in that context. It is not that they do not know the other one; their brain just takes the fast lane. Bilingual adults do exactly the same. Far from a fault, mixing shows your child handles two systems and can draw on both. As vocabulary grows in each, the mixing will fade on its own.
What to say in the moment
The strategy with the least friction and the most language is called a recast: you take what they said and give it back in full in the right language, without correcting or flagging the error. You give the model without cutting them off.
Instead of correcting, reformulate
Your child: «I want the pelota.» You: «Oh, you want the ball! Here you go, here is the ball.» You have handed over the missing word, naturally, without telling them they got it wrong. That is a recast.
Do not say «that is Spanish, say it in English»
Avoid «that is not how you say it» or «that word is Spanish». Correcting head-on mid-excitement tends to make children talk less, the opposite of what you want. The goal is more language, not less.
Follow the conversation, not the error
What matters is what they were trying to tell you, not the stray word. Answer the message —«what a beautiful butterfly!»— and give the model along the way. Communication first; the language follows.
If you want less mixing, give them more of the weaker language
Mixing is not «corrected»: it dissolves on its own once the weaker language has more vocabulary. So rather than chasing the mixing, water the weaker language. Concrete things that work:
Name in their language what they are missing
If they always say «mariposa» and never «butterfly», that word only exists for them in one language. Use it often yourself, without correcting: «a butterfly!, look at the butterfly». You are handing over the missing piece.
Widen their world in the weaker language
Stories, songs, videos, play with other children in that language. The more different contexts, the more new words. A language used only for «tidy up» and «dinner time» runs short on vocabulary.
Be patient with the timing
Vocabulary grows at their pace, not yours. Mixing fades over months, not days. If you keep giving rich, warm language, the child will gradually have the right word more to hand.
When it is worth checking in
Mixing languages is not a worry in itself. What does warrant a chat with your pediatrician or a speech-language therapist is if you notice signs of difficulty in BOTH languages at once: very few words for their age counting both languages, not forming sentences when peers already do, or struggling to make themselves understood in either. Mixing, on its own, is not one of those signs. It is a normal part of growing up bilingual.
Frequently asked questions
Should I correct them when they mix?
Correcting head-on does not help and tends to make them talk less. Better to reformulate: repeat what they said, in full, in the right language, and carry on the conversation. You give the model without stalling them.
Does mixing mean they are behind?
No. Mixing is a sign they handle two languages, not a delay. It fades on its own as vocabulary grows in both. A delay is assessed by looking at BOTH languages together, not at the mixing.
Until what age is mixing normal?
It shows up throughout the preschool years and gradually decreases. Many bilingual children and adults keep switching languages naturally; it stops being something to «fix».