Understanding the 8 Most Common Causes of Speech Delay in Children

There are several possible causes of speech delay in children, and not every child struggles for the same reason. Some are simply slower to start talking. Others have trouble hearing, forming sounds, or putting words together. Finding out what’s behind the delay is the first step toward getting the right help.

What Is Considered Delayed Speech?

Children learn to talk at different ages. Still, there are certain speech and language skills most children develop along the way.

For example, the CDC reports that most 2-year-olds can put at least two words together. By 30 months, most use around 50 words.

A child who isn’t meeting these milestones could have a speech or language delay. Speech involves making sounds, while language involves understanding and using words.

If you’re concerned about your child’s progress, a speech delay assessment can help you understand what’s happening.

Does Your Child Have A Speech Delay?

It’s easy to compare your child’s speech with other kids their age. However, everyday habits often tell you more about how they’re doing.

Here are some signs worth paying attention to:

• At 12 months: Your baby rarely babbles or uses gestures like waving.
• At 18 months: Your toddler says very few words or has trouble with simple requests.
• At 24 months: Your child isn’t putting two words together, such as “want juice.”
• At 36 months: Even people who know your child well have trouble understanding their speech.

These signs don’t always mean something serious is wrong. They do mean it’s worth talking to a pediatrician or speech-language pathologist (SLP).

What are the Causes of Speech Delay?

There’s no single reason why a child might struggle with speech. Some delays affect talking alone, while others are linked to hearing, movement, or overall development.

Primary Speech Delay

Some children are late talkers despite doing well in other areas. They play, move, and interact with others as expected but have trouble using words.

This is different from a broader developmental disorder, which can affect several skills at once. A child might struggle with speech, play, learning, or social interaction.

An SLP looks at more than just how many words a child says. They also check how well the child understands language and connects with other people.

Autism Spectrum Disorder (ASD)

Some children with autism have difficulty using language to communicate with others. They might repeat phrases, rarely point to share something interesting, or struggle with back-and-forth conversations.

Others speak well but have trouble with social communication.

Having a speech delay doesn’t automatically mean a child has autism. A full developmental assessment helps identify other signs.

Cerebral Palsy (CP)

Cerebral palsy affects movement and muscle control. For some children, this includes the muscles needed for speech.

They might know exactly what they want to say but have trouble saying it clearly.

Speech therapy can help improve communication. Some children also benefit from picture boards or speech-generating devices.

Childhood Apraxia of Speech

A child with apraxia knows what they want to say, but their brain has trouble planning the movements needed to say it.

For example, they might say “banana” correctly once but struggle to repeat it. Longer words can be especially difficult.

Treatment usually involves regular practice with speech sounds and word patterns.

Dysarthria

Dysarthria happens when a child has trouble controlling the muscles used for speech.

Their words might sound slurred, slow, quiet, or unclear. Some children also struggle to control their breathing while talking.

Unlike apraxia, the main issue involves muscle movement and control rather than planning speech movements.

Childhood Apraxia of Speech vs. Dysarthria

These conditions can sound similar, but they affect speech in different ways.

A child can have both conditions. An SLP checks speech sounds, movement, and speaking patterns to find the right treatment.

Hearing Loss

Children learn many speech sounds by listening to the people around them.

When they can’t hear certain sounds clearly, learning words becomes harder. Even mild hearing loss can affect speech development.

A hearing test can help rule out this cause. Early support gives children better access to spoken language.

Intellectual Disability

Learning to speak can take longer for children with intellectual disabilities. You might notice that your child needs extra practice learning new words or following simple directions.

These struggles can show up during play, at mealtimes, or when they’re learning new things. An SLP can work on everyday skills, like asking for a snack, telling someone what they need, or joining a game with other children.

Selective Mutism

Some children talk freely at home but become silent in places like school or daycare.

This can happen because of selective mutism, an anxiety disorder that makes speaking in certain situations difficult.

These children aren’t simply refusing to talk. Treatment helps them feel safe enough to use their voice in more settings.

Worried about your child’s speech? Contact Precision Speech Therapy to schedule an assessment in Forney, Texas. An SLP can help you understand your child’s needs and plan the next steps.

What are the early intervention strategies for primary speech delay?

A good place to start is whatever your child already enjoys doing. If they love playing with toy cars, try saying “car goes fast!” as you roll one across the floor. Give them a moment to copy you, make a sound, or point to the car. An SLP can show you other ways to turn playtime into speech practice without making it feel like a lesson.

How is childhood apraxia of speech diagnosed by an SLP?

An SLP listens to how your child says different sounds, words, and short phrases. They might ask your child to repeat the same word several times to check for changes in pronunciation. They’ll also look at speech rhythm and how smoothly sounds fit together. These checks help them tell apraxia apart from other speech disorders.

What are the treatment options for selective mutism?

A child who chats nonstop at home might freeze when a teacher asks them a question. Treatment starts by helping the child feel safe rather than pushing them to speak. A mental health professional may use cognitive behavioral therapy and gentle, step-by-step speaking activities. Teachers and parents can help by giving the child small chances to speak without putting them on the spot.

How can parents encourage speech development at home?

Try talking with your child during things you already do together, like bath time or putting away toys. Name what they’re looking at, then pause to see if they respond. If they point to a dog and say “dog,” you could answer, “Yes, the dog is sleeping!” Don’t worry about getting every word right. What matters is giving your child plenty of chances to join in.

Can a child have a speech delay without autism?

Yes. Being late to talk doesn’t mean a child has autism. For example, a child with hearing loss might miss parts of words even though they enjoy playing and spending time with others. Some children also have speech sound disorders that make talking difficult. An SLP can check these skills and help you work out whether your child needs other tests.

When should parents seek a speech evaluation?

If you’ve been worried about your child’s speech, you don’t have to keep guessing. Ask for an evaluation when words aren’t coming as expected, simple instructions seem hard to follow, or your child stops using words they once knew. Your pediatrician can help arrange a hearing test and a visit with an SLP. Even if no major concern is found, the appointment can give you a better idea of what to watch for as your child grows.

You hear your child talk every day, so you’re often the first to notice when something seems off. A speech delay can have several causes, and guessing at the reason won’t give you much peace of mind. A speech assessment can help you understand what’s going on and what you can practice together at home.