Potty-training, teething, learning to ride a bike: some children are quick to reach each of these milestones, whereas others are much slower. The differences between children can be huge, and such differences also exist when it comes language development. But how do you know when your child’s progress in learning a language really is too slow? What should you do as a parent or teacher of a bilingual child, if you’re worried about his or her language development in one of their two languages, or perhaps even in both? At what point is it wise to contact a professional such as a speech language therapist? And if you are such a professional, what is the best way of approaching assessment in bilingual children? 

You often hear that bilingual children are slower to learn their two languages than monolingual children. People refer to this as a language delayLanguage delay is used in different ways by different people and so it’s not always clear what this term means. Often times, language delay is used to refer to a child who is lagging behind in his or her language development in the language used at school (so Dutch in the Netherlands, English in the UK, etc.). For bilingual children, this may be due to the fact that – because they’re learning two languages at the same time – they have less contact with the school language than their monolingual peers. At the same time, having a language delay can also mean that something else is going on, namely that the child has what’s called a developmental language disorder, often abbreviated to DLD. DLD is a condition which affects one in fifteen children and is just as common in monolingual children as it is in bilinguals. 

In this episode of Kletsheads we talk to Sean Pert, speech language therapist and researcher, about language delay and DLD. We learn that if a bilingual child has DLD, this will be visible in both their languages. This means that DLD is not simply the same as being unable to speak the school language well. We learn what the characteristics of DLD are, what to do as a parent if you think your child might have DLD, and what to pay attention to when diagnosing DLD in bilingual children. Our Kletshead of the week is the brillliant Naia and in Let’s Klets we talk to an educational consultant about five simple steps in include multilingualism in the classroom.

Period11 Jan 2021

Media contributions


Media contributions


  • Bilingualism
  • Language Disorder