Developmental Language Disorder vs Fetal Alcohol Spectrum Disorder
DLD vs FASD in Young Children: What's the Difference?
Developmental Language Disorder (DLD) is a language-specific difficulty with no known cause in an otherwise typically developing child, centred on understanding and using words. Fetal Alcohol Spectrum Disorder (FASD) is caused by alcohol exposure in pregnancy and affects many areas — growth, learning, attention, behaviour and motor skills — with language being only one part. The key difference is cause and spread: FASD has a known prenatal cause and wide-ranging effects, while DLD has an unknown cause and is focused on language. Only a clinician can tell them apart, and they need different support plans.
Both can make talking and learning harder in the early years — but one begins in the womb, and the other shows up only in how language develops.
In short
Developmental Language Disorder (DLD) is a difficulty with understanding and using language that has no obvious cause — the child is otherwise developing typically, with no brain injury, hearing loss or known prenatal exposure. Fetal Alcohol Spectrum Disorder (FASD) is caused by alcohol reaching the baby during pregnancy, and it affects far more than language — it can touch growth, facial features, learning, attention, memory, behaviour and motor skills. Put simply: DLD is language-specific with an unknown cause, while FASD is a whole-body, whole-brain condition with a known prenatal cause where language is just one part of a wider picture.How they differ in everyday life
A young child with DLD typically understands the world around them well but struggles with words — they may speak in shorter sentences, mix up word order, find new words hard to learn, or have trouble following longer instructions. Their play, social warmth and physical development are usually on track; it is language itself that lags.A young child with FASD often shows a broader spread of differences. Alongside any speech and language delay, you might notice slower growth, difficulties with attention and impulse control, problems with memory or learning, trouble understanding consequences, and sometimes subtle differences in facial features. Because alcohol affects the developing brain widely, the challenges are rarely limited to one area.
The key clue is the story and the spread: FASD has a known cause (alcohol in pregnancy) and affects many domains; DLD has no clear cause and is centred on language. Only a clinician can tell them apart — and the two need quite different support plans, even where speech therapy helps both.
When to seek a look
If your toddler isn't combining words by around two years, is hard to understand, or seems to struggle understanding what you say, a developmental check is wise — whatever the cause. If there was known alcohol exposure during pregnancy, or you see delays across several areas (growth, attention, learning and language), share this openly with the assessing team; it helps them support your child precisely and without judgement.The Pinnacle way
This is general information, not a diagnosis — a clinical AbilityScore® and any diagnosis are formed only at a Pinnacle Blooms Network centre, under qualified clinician care, never from an app or form. Our clinicians look at the whole child — language, learning, movement, attention and growth — to understand what is really going on, then build the right plan, often blending speech therapy with broader developmental support. Learn more about Developmental Language Disorder and explore our [services](/).Trusted sources
The American Speech-Language-Hearing Association on developmental language disorder and early language milestones; the CDC and the American Academy of Pediatrics on fetal alcohol spectrum disorders and prenatal alcohol exposure.Next step — Unsure which picture fits your child? Book a developmental screening and let a Pinnacle clinician gently sort out the cause and the right support.
What to watch
A child whose challenges are limited to language — short sentences, trouble following instructions, hard to understand — points more towards DLD. A child with delays across several areas (growth, attention, learning and language), especially with known alcohol exposure in pregnancy, may need assessment for FASD.
Try this at home
Narrate your day in short, clear sentences and pause to let your child respond — 'We're washing the cup. Cup is wet!' This gentle modelling supports language whatever the underlying picture, and your warmth matters more than getting every word right.
Trusted sources
Developed by SETU Consortium · Pinnacle Blooms Network · Last reviewed 2026-06-10 · reviewed every 365 days
This is general information, not a diagnosis. A clinical AbilityScore® and any diagnosis are formed only at a Pinnacle Blooms Network centre, under qualified clinician care.
Frequently asked
Can a child have both DLD and FASD?
Language difficulties can appear in FASD, but DLD is diagnosed only when there is no known cause such as prenatal alcohol exposure. If alcohol exposure is part of the story, the language delay is usually understood as part of FASD rather than as DLD. A clinician untangles this through a full assessment.
Is DLD caused by something the parent did?
No. DLD has no known cause — it is not caused by parenting, screen time or anything you did or didn't do. It simply means a child finds language harder to acquire than expected, despite otherwise typical development.
Does FASD always show in a child's face?
Not always. Only some children with FASD have the recognised facial features; many do not. The brain and learning effects can be present without any visible signs, which is why open sharing about pregnancy history helps clinicians assess accurately and kindly.
Does speech therapy help both conditions?
Yes — speech therapy supports language growth in both DLD and FASD. However, a child with FASD usually needs a broader plan addressing attention, learning and behaviour too, while DLD support stays more focused on language.