What Is a Language Disorder in Children? Signs, Developmental Language Disorder, Diagnosis, and Treatment

A child may know exactly what they want to say but struggle to find the words.

Another may speak in long sentences yet have difficulty understanding directions, answering questions, or following a classroom lesson.

A third may know many words but struggle to organize them into a clear story.

All of these children may be experiencing difficulties with language.

A language disorder is more than talking late or occasionally using the wrong word. It involves persistent difficulty learning, understanding, or using language in ways that affect communication, learning, relationships, or participation in everyday life. The American Speech-Language-Hearing Association (ASHA) describes spoken language disorders as persistent difficulties acquiring and using listening and speaking skills across one or more areas of language, including phonology, morphology, syntax, semantics, and pragmatics.

One important type is developmental language disorder (DLD). DLD is common—affecting approximately 1 in 14 children—yet it remains less widely recognized than conditions such as autism or dyslexia.

Language disorders can affect much more than conversation. They may influence:

• understanding classroom instruction;
• learning new vocabulary;
• constructing sentences;
• telling stories;
• reading comprehension;
• writing;
• following directions;
• explaining ideas;
• understanding figurative language;
• participating socially; and
• communicating needs, thoughts, and experiences.

The specific pattern varies considerably from one child to another.

What Is a Language Disorder?

A language disorder is a persistent difficulty understanding and/or using language that has a meaningful impact on everyday functioning.

Language is a complex system. Children must learn:

• the sounds and sound patterns of their language;
• the meanings of words;
• how words change form;
• how words combine into sentences;
• how sentences connect into conversations and stories; and
• how language changes according to the situation and communication partner.

Types of Language Disorders: A Broad Spectrum

The breadth of language disorders covers a range of issues affecting the Form, Content, and Use of language (Bloom and Lahey, 1978)—the three cornerstones of communication as outlined by Bloom and Lahey's model. Form relates to the structural aspects of language, such as syntax and phonology; Content refers to semantics or the meaning conveyed; and Use involves pragmatics, which is how language is used in social contexts.

The chart below breaks down common language disorders by their symptoms and impact, to help parents and educators tell them apart.

Because language disorders cover such a broad range of difficulties, an intervention plan should start with a careful assessment that distinguishes between expressive language disorder, receptive language disorder, or developmental language disorder.

What Is Developmental Language Disorder?

Developmental language disorder, or DLD, is a neurodevelopmental disorder that causes persistent difficulty learning, understanding, or using language when those difficulties are not explained by a known biomedical condition such as hearing loss, autism, or intellectual disability.

The international CATALISE consensus recommended the term language disorder for language difficulties that cause functional impairment and are associated with a poor prognosis, and developmental language disorder when the language disorder is not associated with a known biomedical cause.

DLD may affect:

• speaking;
• listening;
• vocabulary;
• grammar;
• sentence comprehension;
• storytelling;
• reading;
• writing; and
• academic learning.

DLD is also relatively common.

NIDCD estimates that it affects approximately 7% of children—or about 1 in 14.

Is Developmental Language Disorder the Same as Being a Late Talker?

No.

This is an important correction to a common misconception.

Late language emergence and developmental language disorder are related concepts, but they are not interchangeable.

A young child may begin speaking later than expected and later develop language within an expected range. ASHA notes that many children described as “late talkers” eventually demonstrate language skills within broadly expected limits, although some continue to experience later language or literacy difficulties.

DLD, in contrast, refers to persistent language difficulties.

NIDCD explains that many children with DLD have a history of talking late, but children with DLD continue to demonstrate language difficulties beyond that early period.

So:

Late talking is an early developmental pattern.

DLD is a persistent neurodevelopmental language disorder.

A child cannot be reliably diagnosed with DLD simply because they were slow to begin speaking.

What Is “Expressive Language Disorder”?

Parents frequently encounter the term expressive language disorder.

It describes a pattern in which a child has particular difficulty using language to communicate.

Possible signs include:

• limited vocabulary;
• difficulty learning new words;
• frequent word-finding problems;
• short or grammatically immature sentences;
• difficulty using verb endings;
• difficulty explaining ideas;
• difficulty retelling events;
• poorly organized narratives; or
• difficulty producing sufficiently detailed responses.

ASHA identifies slower vocabulary growth, word-finding difficulty, grammatical problems, restricted sentence length, and difficulties organizing narratives among common characteristics of spoken language disorders.

However, modern clinical terminology is more nuanced than simply dividing every child into “expressive” versus “receptive” disorders.

A child may have a predominantly expressive profile, but careful assessment may reveal subtle comprehension difficulties as language becomes more complex.

For that reason, SLPs evaluate the child's entire language system.

What Is “Receptive Language Disorder”?

Receptive language difficulties involve problems understanding language.

A child may have difficulty:

• following directions;
• understanding questions;
• learning unfamiliar words from context;
• understanding grammatical relationships;
• processing complex sentences;
• understanding stories;
• making inferences;
• understanding figurative language; or
• keeping up with fast classroom instruction.

ASHA specifically identifies difficulties understanding new vocabulary, questions, directions, complex syntax, narratives, and inferential information among possible signs of spoken language disorder.

This is not primarily a failure of the ear to convert sound into meaning.

That distinction is important.

A child with suspected language disorder should have hearing considered as part of the evaluation, but language comprehension involves linguistic processing rather than simply detecting acoustic information. ASHA recommends hearing screening as part of comprehensive language assessment when it has not already been completed.

Can a Child Have Both Receptive and Expressive Language Difficulties?

Yes.

Many children experience difficulties with both understanding and expressing language.

For example, a child may:

• misunderstand a complex question and give an incomplete answer;
• struggle to learn a new vocabulary word and struggle to retrieve it later;
• misunderstand grammatical structures and produce similar structures incorrectly.

This is why the child's receptive and expressive skills should be assessed together rather than assuming that one label completely describes the disorder.

What Does a Language Disorder Look Like in Young Children?

Signs depend on the child's age and developmental stage.

A younger child with language difficulties might:

• begin combining words later than expected;
• learn new words slowly;
• have difficulty understanding familiar directions;
• use limited sentence structures;
• make grammatical errors more frequently than peers;
• struggle to participate in conversation; or
• become frustrated when communication breaks down.

NIDCD identifies delayed word combinations, difficulty learning new vocabulary, difficulty following directions, and frequent grammatical errors among common signs of DLD in younger children.

A young child may also have difficulty with:

• pretend play;
• narrative development;
• conversational turn-taking;
• answering questions;
• describing events; or
• explaining what happened.

The exact pattern matters more than any single symptom.

What Does a Language Disorder Look Like in School-Age Children?

Language difficulties may become more visible as academic demands increase.

A school-age child with language disorder may have difficulty:

• following multistep classroom directions;
• learning academic vocabulary;
• understanding complex sentences;
• explaining their reasoning;
• answering open-ended questions;
• summarizing information;
• retelling a story in sequence;
• making inferences;
• understanding multiple-meaning or figurative language;
• participating in classroom discussions;
• reading comprehension;
• organizing written work; or
• learning morphological structures such as prefixes and suffixes.

ASHA notes that language difficulties can change over time and may become especially apparent when children encounter increasingly complex reading, writing, narrative, and academic-language demands.

A child who seemed to “catch up” conversationally may therefore encounter new difficulty later when language requirements become more demanding.

ASHA describes this phenomenon as illusory recovery: everyday language may appear improved while weaknesses emerge again under more complex academic demands.

Language Disorder Can Sometimes Look Like a Behavior Problem

Language difficulties are not always obvious.

Imagine a teacher says:

“Finish the first three questions, underline the evidence that supports your answer, and then compare your response with your partner.”

A child with language comprehension difficulties may:

• begin the wrong task;
• watch classmates to determine what to do;
• sit without starting;
• ask an unrelated question; or
• appear to ignore the teacher.

That can be interpreted as:

“He isn't listening.”

But the underlying problem may be:

“He did not understand the instruction.”

NIDCD specifically cautions that language difficulties may be misinterpreted as shyness, defiance, or other behavioral problems.

Similarly, children who struggle to express themselves may become frustrated, withdraw from interaction, or rely on behavior when language is insufficient for the situation.

That does not mean every behavioral difficulty is caused by language.

It means language should be considered when a child's behavior repeatedly occurs in situations with substantial communication demands.

What Causes Language Disorders?

There is no single cause of all childhood language disorders.

The answer depends partly on the type of language disorder.

Developmental Language Disorder

The exact cause of DLD is not known.

NIDCD characterizes DLD as a neurodevelopmental disorder arising from complex interactions involving genes and development. DLD tends to run in families, and children with DLD are more likely to have relatives with histories of language difficulty.

ASHA similarly describes DLD as involving multiple interacting factors, including genetic variation, cognitive processing differences, and neurological differences observed in research.

DLD is not caused by parents failing to talk to their child enough.

NIDCD specifically states that DLD is not explained by insufficient exposure to language.

Environmental and social factors can influence language opportunities and may interact with biological risk, but it is inaccurate—and potentially harmful—to suggest that a child's DLD is simply the result of an inadequate home language environment.

Language Disorder Associated With Another Condition

ASHA recommends distinguishing DLD from a language disorder associated with a known condition.

For example, language difficulties may occur in association with:

• autism;
• Down syndrome;
• intellectual disability;
• hearing impairment;
• traumatic brain injury;
• genetic syndromes; or
• other developmental or neurological conditions.

In these situations, the language disorder remains clinically important, but the terminology recognizes the associated condition.

Does Bilingualism or Multilingualism Cause Language Disorder?

No.

Learning more than one language does not cause developmental language disorder.

NIDCD explicitly states that multilingualism does not cause DLD and is not harmful for children who have DLD.

ASHA similarly states that multilingualism is not a cause of speech or language disorders.

A multilingual child's skills may be distributed across languages.

For example, a child may know the word for one concept in Spanish and a different concept in English.

Code-switching or mixing languages can also be part of typical multilingual development.

A true language disorder should be evident across the child's languages, although the specific way it appears can differ according to each language's structure and the child's experience with that language.

Parents should not be advised to abandon a home language simply because their child has a language disorder.

How Common Is Developmental Language Disorder?

DLD is more common than many families realize.

NIDCD reports a prevalence of approximately 7%, or roughly 1 in every 14 children.

Population studies cited by ASHA have reported similar estimates, although prevalence varies depending on diagnostic criteria and the population studied.

This means a typical classroom may include children with significant language-learning difficulties even when those difficulties have not yet been identified.

Is Language Disorder the Same as Autism?

No.

A child can have a language disorder without having autism.

A child can also have autism and a language disorder.

DLD is specifically used when persistent language difficulties are not explained by a known biomedical condition such as autism. When a language disorder occurs in association with autism, ASHA recommends terminology such as language disorder associated with autism rather than DLD.

An evaluation should examine the child's full developmental profile rather than attempting to distinguish conditions from one symptom alone.

Is DLD the Same as a Learning Disability?

Not exactly.

NIDCD states that DLD is not itself the same thing as a learning disability, but it can substantially increase the risk of later academic difficulties because language is fundamental to learning.

Children with language disorder may have difficulty with:

• reading comprehension;
• spelling;
• written grammar;
• vocabulary;
• understanding mathematical word problems;
• organizing written responses; and
• acquiring new academic concepts.

ASHA likewise notes a strong relationship between spoken language disorders and reading/writing difficulties.

This is one reason language assessment should not stop once a child learns to speak in apparently complete sentences.

How Is a Language Disorder Diagnosed?

Diagnosis requires more than one vocabulary test or one standardized score.

ASHA recommends a comprehensive, culturally and linguistically appropriate assessment that examines the child's functional communication as well as performance across relevant language domains.

An evaluation may include:

Developmental and Case History

The SLP may gather information about:

• developmental milestones;
• medical history;
• hearing;
• family history;
• previous services;
• parent concerns;
• teacher concerns;
• academic performance;
• languages and dialects used; and
• the child's communication across settings.

ASHA specifically recommends gathering developmental, family, educational, cultural, and linguistic information.

Hearing Screening

Hearing should be considered when a child has language difficulties.

ASHA includes hearing screening within comprehensive assessment when it has not already been completed.

Standardized Language Assessment

Standardized testing may examine areas such as:

• receptive vocabulary;
• expressive vocabulary;
• grammar;
• sentence comprehension;
• sentence formulation;
• concepts; and
• higher-level language.

But standardized scores are only one source of evidence.

Language Sampling

The clinician may examine how the child communicates during:

• conversation;
• play;
• storytelling;
• picture description;
• classroom tasks; or
• other naturalistic interactions.

A language sample can reveal difficulties that may not be obvious on structured testing.

Narrative Assessment

For preschool and school-age children, storytelling can provide information about:

• sequencing;
• story grammar;
• sentence complexity;
• vocabulary;
• cohesion;
• perspective;
• causal relationships; and
• the amount of information provided to a listener.

ASHA identifies narrative and discourse skills as important components of language assessment.

Functional Impact

Assessment should answer a crucial question:

How are the child's language difficulties affecting everyday life?

For example:

• Can the child participate in classroom discussions?
• Can they explain what happened?
• Can they follow instruction?
• Can they make friends and maintain conversations?
• Can they understand what they read?
• Can they express what they know?

The CATALISE consensus specifically emphasizes functional impairment when defining language disorder.

Diagnosing Language Disorders in Multilingual Children

Multilingual assessment requires particular care.

A child should not be diagnosed with language disorder simply because their English does not resemble that of a monolingual English-speaking peer.

ASHA notes that standardized scores may not be valid when the test's normative sample does not represent the child or when standardized procedures have been modified in unsupported ways.

Assessment may therefore include:

• detailed language-exposure history;
• caregiver interviews;
• samples across languages;
• interpreters;
• criterion-referenced measures;
• observation;
• dynamic assessment; and
• multiple sources of converging evidence.

ASHA describes dynamic and non-normed measures as particularly important for distinguishing language difference from disorder in culturally and linguistically diverse children.

Research reviews also suggest that dynamic assessment can be a useful complementary approach for identifying language disorder in multilingual children because it evaluates how a child learns with support rather than comparing only accumulated knowledge.

A Child Does Not Need a Low IQ to Have a Language Disorder

Historically, some diagnostic approaches required a large discrepancy between language ability and nonverbal intelligence.

That approach is no longer supported.

The CATALISE consensus concluded that DLD does not require a mismatch between verbal and nonverbal ability.

ASHA likewise advises against cognitive referencing—using the difference between IQ scores and language scores to determine whether a child deserves language intervention.

Children with a range of cognitive profiles can experience meaningful language difficulties and benefit from intervention.

How Are Language Disorders Treated?

There is no single therapy program that is appropriate for every child with a language disorder.

Treatment should be based on:

• age;
• language profile;
• functional needs;
• severity;
• educational demands;
• communication environments;
• family priorities;
• languages used; and
• response to intervention.

ASHA recommends individualized treatment that targets meaningful communication and is continually adjusted according to progress.

Treatment may address several areas.

Vocabulary and Semantics

A child may work on:

• learning new vocabulary;
• understanding multiple meanings;
• describing similarities and differences;
• categories;
• word relationships;
• verbs;
• academic vocabulary; and
• developing richer semantic representations.

Recent systematic review evidence indicates that vocabulary interventions can improve taught word knowledge in children with DLD, with approaches explicitly targeting both semantic and phonological properties of words showing particularly encouraging evidence.

Grammar and Sentence Structure

Treatment may target:

• verb tense;
• pronouns;
• articles;
• plurals;
• auxiliaries;
• conjunctions;
• complex sentences; or
• understanding grammatical relationships.

ASHA identifies morphology and syntax as common intervention targets from preschool through adolescence.

Narrative Language

Storytelling is important because children use narratives constantly:

• explaining what happened;
• retelling books;
• sharing experiences;
• answering classroom questions;
• reading;
• writing; and
• socializing.

Narrative intervention may target:

• story structure;
• sequencing;
• characters and setting;
• problems and solutions;
• causal relationships;
• cohesion; and
• sentence complexity.

ASHA identifies narrative intervention as a recognized language-treatment approach supported by systematic-review literature.

Recasts and Expansions

For younger children, clinicians may respond to the child's language with a more complete grammatical model.

Child: “Dog run.”

Adult: “The dog is running.”

This is an expansion.

A clinician may also restructure an utterance while preserving its meaning—a strategy known as a recast.

ASHA identifies expansions and recasts as established child-oriented language-intervention techniques.

Focused Stimulation

In focused stimulation, the clinician intentionally provides many natural examples of a target word or grammatical form without requiring the child to imitate each model.

For example, when targeting is + verb-ing during play:

“The dog is running.”

“Mom is cooking.”

“The baby is sleeping.”

“The car is moving.”

ASHA describes focused stimulation as a hybrid intervention in which target forms are presented frequently in meaningful, functional contexts.

Parents and Caregivers Can Be Part of Language Intervention

Parents do not need to become their child's therapist.

But caregivers can learn strategies that increase opportunities for communication during ordinary routines.

A meta-analysis of parent-implemented language interventions found positive effects on children's receptive and expressive language abilities.

A later systematic review and meta-analysis also found that training caregivers to use language and communication strategies was associated with improvements in children's language outcomes.

Caregiver-supported strategies may include:

• following the child's interests;
• expanding what the child says;
• modeling slightly more advanced language;
• creating communication opportunities;
• shared reading;
• using target vocabulary during routines; and
• encouraging conversation without turning every interaction into a test.

ASHA identifies caregiver-mediated intervention and interactive book reading as recognized approaches for supporting language development.

Does Speech-Language Therapy Work for Language Disorders?

Research overall supports language intervention, but effectiveness varies according to:

• the language domain being treated;
• the child's profile;
• intervention type;
• intensity;
• age;
• treatment targets; and
• the outcome being measured.

A systematic review of treatment for DLD found evidence supporting benefits across several language domains, while also identifying variability in the quality and quantity of evidence for different intervention approaches.

Research examining service-delivery models has also found evidence supporting individualized intervention, particularly for children with more pervasive or complex language needs.

Treatment therefore should not be viewed as one standardized package.

The more useful question is:

Which treatment approach is appropriate for this child's particular language profile and functional goals?

Can Technology or Language Apps Treat a Language Disorder?

Technology can be useful—but claims need to be realistic.

Digital tools may support:

• vocabulary practice;
• repeated exposure;
• visual supports;
• home practice;
• progress monitoring;
• telepractice;
• interactive reading;
• AAC; or
• clinician-directed activities.

ASHA recognizes computerized instruction and other technology as possible modalities used alongside intervention, but inclusion of a technology does not mean that ASHA endorses a specific product.

The evidence for digital intervention in DLD is still developing.

A 2025 systematic review found substantial variability in the types of digital intervention studied and concluded that evidence remains insufficient to determine effectiveness consistently across different language domains.

For that reason, commercial apps should not be presented as substitutes for comprehensive assessment or individualized intervention.

A better use of technology is:

clinician-selected goal → appropriate digital support → monitored practice → measurement of progress

rather than:

download an app → treat a language disorder

Can AAC Be Used With a Child Who Has a Language Disorder?

Yes, when appropriate.

Some children with significant expressive communication needs may benefit from augmentative and alternative communication (AAC) either as their primary communication method or as a supplement to speech.

AAC can include:

• gestures;
• signs;
• picture-based systems;
• communication boards; and
• speech-generating devices.

ASHA specifically identifies AAC as a communication modality that may be used by individuals with spoken language disorders to supplement or support communication.

AAC does not mean that spoken language goals must be abandoned.

The purpose is to ensure that a child has an effective way to communicate.

Is Language Disorder a Lifelong Condition?

For DLD, language difficulties often persist but change in appearance over time.

NIDCD explains that DLD is developmental and likely continues into adulthood, although the manifestation changes with age. A younger child may struggle with grammar in conversation, while an older student may have difficulty organizing complex writing or understanding academic language.

ASHA similarly notes that language profiles change as linguistic and academic demands increase.

This does not mean intervention is ineffective.

NIDCD states that early intervention can improve language skills and that older children and adults can also benefit from treatment and strategies.

A more accurate goal is not necessarily to “erase” DLD.

The goal is to help the individual:

• develop language skills;
• access education;
• communicate effectively;
• participate socially;
• build compensatory strategies; and
• become increasingly independent.

Why Early Identification Matters

Language underlies much of childhood learning.

Children use language to:

• understand teachers;
• acquire vocabulary;
• learn to read;
• comprehend stories;
• solve verbal problems;
• explain their reasoning;
• interact with classmates; and
• organize written information.

Persistent language difficulties are associated with increased risk for reading and writing problems. ASHA reports substantial overlap between DLD and dyslexia, while NIDCD describes DLD as an important risk factor for later learning difficulties.

A 2024 systematic review likewise confirms that children with DLD have elevated rates of co-occurring reading difficulties.

That makes language assessment relevant not only to communication but also to academic development.

When Should a Child Be Evaluated for a Language Disorder?

Consider discussing an evaluation with a speech-language pathologist when a child consistently has difficulty with areas such as:

• learning new words;
• understanding spoken language;
• following directions;
• combining words or constructing sentences;
• using age-appropriate grammar;
• answering questions;
• finding words;
• explaining ideas;
• maintaining conversations;
• telling organized stories;
• understanding classroom instruction;
• reading comprehension;
• written language; or
• communicating effectively in everyday situations.

Concerns are especially worth investigating when difficulties:

• persist over time;
• occur across different settings;
• interfere with participation;
• affect learning;
• create frustration;
• are noticed by multiple people; or
• appear to increase as language demands become more complex.

A screening can identify the need for more assessment, but ASHA emphasizes that screening itself does not diagnose a language disorder.

Frequently Asked Questions About Language Disorders

What is a language disorder in simple terms?

A language disorder is a persistent difficulty learning, understanding, or using language that affects communication or everyday functioning. It may involve vocabulary, grammar, sentence comprehension, storytelling, social language, or several areas simultaneously.

What is developmental language disorder?

Developmental language disorder, or DLD, is a persistent language disorder that is not explained by a known biomedical condition such as hearing loss, autism, or intellectual disability. It affects approximately 1 in 14 children.

Is expressive language disorder the same as DLD?

Not necessarily.

“Expressive language disorder” describes difficulty using language. DLD may involve primarily expressive difficulties, receptive difficulties, or a combination. Modern clinical terminology generally focuses on the child's overall language profile and underlying etiology rather than assuming all language disorders fit into one expressive/receptive category.

What is the difference between receptive and expressive language?

Receptive language involves understanding language.

Expressive language involves communicating ideas through language.

A child may have difficulty in one area or both.

Is language disorder the same as speech delay?

No.

Speech concerns involve producing spoken sounds, fluency, or voice. Language disorders involve learning, understanding, and using the system of language. A child can have either difficulty independently or both together.

Is developmental language disorder the same as autism?

No. DLD occurs when persistent language difficulties are not explained by a known condition such as autism. Children with autism can also have language disorders, but ASHA describes these as language disorders associated with autism rather than DLD.

Does bilingualism cause language disorder?

No. Multilingualism does not cause DLD or another language disorder. A multilingual child with DLD will demonstrate underlying difficulty across the languages they use, although the exact signs may differ between languages.

Can a child with normal intelligence have a language disorder?

Yes.

DLD does not require a discrepancy between language ability and nonverbal intelligence. ASHA advises against using IQ-language discrepancies as a requirement for language services.

Can children grow out of language disorders?

Some young children who talk late eventually develop language within expected ranges. Persistent DLD, however, tends to continue in some form as children grow, although its presentation can change substantially. Intervention can improve language and functional outcomes.

Can speech therapy help a language disorder?

Yes. Research supports language intervention, although the most effective approach depends on the child's age, profile, target skills, and needs. Intervention may address vocabulary, grammar, comprehension, narratives, social communication, literacy, or other areas.

Who diagnoses a language disorder?

Speech-language pathologists play a central role in screening, comprehensive assessment, diagnosis, and treatment of childhood spoken language disorders. Evaluation may also involve audiologists, psychologists, physicians, teachers, and other professionals depending on the child's needs.

The Bottom Line: Language Disorder Is More Than “Talking Late”

A language disorder is not one single pattern.

One child may struggle primarily with vocabulary.

Another may have difficulty understanding grammar.

Another may speak easily in conversation but struggle to organize a story, understand classroom language, or explain complex ideas.

For clinicians, the key sequence is:

identify the communication concern → evaluate the full language system → determine functional impact → distinguish difference from disorder → develop individualized intervention → monitor progress

Developmental language disorder deserves particular awareness because it is both common and persistent, affecting roughly one child in every 14.

Early identification and appropriate intervention can help children develop stronger language skills and strategies for communication, learning, literacy, and participation.

But effective intervention begins with an accurate understanding of the child.

The goal is not simply to produce longer sentences or higher test scores.

The goal is to help children understand language, express meaningful ideas, participate in relationships and education, and communicate as effectively and independently as possible.

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