Two Languages at Home: Does It Harm a Child with Learning Difficulties?
They speak one language at school and another at home. Or perhaps two languages at home from birth and a third at school. This is increasingly common in many families, and a frequent question soon follows: if the child has difficulties with words, reading, or math, are we making things harder by speaking more than one language?
The short answer is no. The research is clear on this. Knowing it can save you unnecessary worry and help you focus on the right next steps.
Learning Two Languages Does Not Cause Learning Difficulties
One of the most common concerns is whether bilingualism "delays" language or even "causes" dyslexia or ADHD. The evidence does not support this idea.
According to the NIDCD (National Institutes of Health), learning more than one language at the same time does not cause developmental language disorder (DLD), which is one of the most common language development difficulties and can later affect reading and writing.
This is important because two things are sometimes confused: a bilingual child needing more time to express themselves in each language (something normal) and having a real learning difficulty (something that requires specialist support). A child learning two languages is neither less intelligent nor less capable of learning. This is what the NICHD points out: a learning difficulty does not indicate a person's intelligence level.
What Is Developmental Language Disorder and How It Relates to Reading
DLD affects approximately 1 in 14 children in preschool, according to the NIDCD. A child with DLD may have more difficulty learning new words, building sentences, or understanding instructions, and this can later extend to reading and writing.
When dyslexia is present, the British Dyslexia Association notes that the most common cognitive difficulty involves phonological processing: the way the brain perceives and manipulates the sounds of language. This can occur in one language as well as another.
This is why, when a bilingual child has difficulties, they tend to show up in both languages. It is not that bilingualism causes the problem, but rather that the learning difficulty is there and can be detected in any of the languages the child speaks.
Why a Reliable Assessment Is Different if the Child Is Bilingual
Here is the second part of the concern: if the child learns in a second language at school, how do professionals know the difficulty is real and not simply an adaptation phase?
According to the NICHD, assessing a learning difficulty must take into account whether the student is bilingual or is learning in a second language. This is a step that does not always happen, and this is where confusion can arise.
A professional with experience in bilingual cases should take several factors into account:
- Observe how they process language in each language, not just the school language.
- Assess the child in the stronger language, if possible.
- Include vocabulary and comprehension tests in both languages.
- Observe the child in the classroom and in informal situations.
- Consider the cultural and family context.
If the assessment does not take bilingualism into account, there is a risk of misdiagnosis in either direction: either the difficulties are attributed to language adaptation when there is actually a real need for support, or what is simply a normal process of learning a second language is interpreted as a learning difficulty.
What You Can Do at Home This Week
Beyond professional assessment, there are practical things that help and do not require specialist knowledge.
Keep the languages you already speak at home. If you speak two languages at home, there is no need to stop. The child will not become "confused" and would lose connection with that language and with the people who speak it with them.
Create calm moments for each language. This could be a song before bed, a story before dinner, or simply playing together while talking. It does not need to be a lesson: it is natural exposure.
Observe without diagnosing. If you notice that the child frequently loses words, regularly swaps syllables, confuses similar sounds, or has persistent reading difficulties, write it down. These are signs worth mentioning to the relevant professional.
Talk with the school's support team. If there is already a suspicion of a learning difficulty, this is the first step. The team can assess whether a referral to a specialist is needed and ensure the school adapts how it teaches.
When to Take the Step of Consulting
If the difficulties are persistent, affect school performance, or cause frustration in the child, it is time to seek advice. Also if you notice the child avoids reading, writing, or situations they previously enjoyed.
Early intervention matters. According to the NICHD, it can reduce its effects throughout life. The idea is not to wait for the problem to disappear on its own, but to act before frustration with learning builds up.
The usual path is: first talk with the class teacher or school counselor, who will assess whether a referral to an external professional is needed. From there, a full assessment will take the child's linguistic profile into account and will be able to distinguish between difficulties that are part of bilingualism and those that require specific support.
If you want to learn more about identifying signs by age, Signs of dyslexia by age: what to look for and when to seek advice has a practical guide. And if you need ideas for talking to the school about accommodations, How to talk to the school about accommodations offers concrete steps.
This article is for guidance only and does not replace a professional assessment. If you notice persistent difficulties, the first step is to talk with the school's support team or with the child's relevant professional.