One of the sentences I hear most often in the clinic is: "He understands everything but doesn't talk." Speech delay is the developmental topic families worry about the most, yet it is also the one they most often postpone by saying "it will resolve on its own." In reality, language development lays the foundation for the social relationships and school success a child will build later on. The good news: most causes of delay can be supported when they are recognised early. The bad news is the price of waiting — every month lost is time stolen from the window in which the brain is most open to language.

In this article I explain the milestones of language development by age, the real causes of delay, which findings are too important to be met with "let's wait," and what you can do at home.

Speech Delay and Language Delay Are Not the Same Thing

Knowing this distinction matters for correct guidance:

  • Language delay: The child's understanding and/or use of words is behind their age. There are two subheadings here: receptive language (understanding) and expressive language (communicating by speaking).
  • Speech (articulation) problem: The child forms age-appropriate sentences but cannot produce sounds correctly; what they say is hard to understand.

The most commonly encountered picture is the child who understands well but uses few words. Good comprehension is a positive sign; however, on its own it does not mean "there is no problem" — follow-up is needed. If comprehension is also behind, that is a reason for a more careful evaluation.

Language Development by Age: What Should We Expect and When?

The milestones below are average windows; rather than a single date, what matters is that development keeps moving forward:

Age Expected language skill
6 months Babbling begins (ba-ba, da-da), turns towards the source of sound
9-12 months Meaningful "mama/dada", responds to name, pointing, "bye bye"
12-15 months 1-3 meaningful words, understands a simple one-step command ("give me the ball")
18 months At least 10-20 words, points to body parts
24 months Around 50 words, combines two words ("mommy water"), half of the child's speech is understood by a stranger
36 months Three-word sentences, answers "what-where" questions, three quarters of speech is understood
4 years Recounts an event they experienced, speech is almost fully intelligible

In babies born prematurely, these milestones are assessed according to corrected age. Language development does not progress on its own but together with motor and social areas; you can find all the general developmental milestones in a table in our month-by-month baby development guide.

Common Causes of Speech Delay

1. Hearing loss. This is the most important and treatable cause of speech delay. Having passed the newborn hearing screening at birth is not enough; fluid that builds up in the middle ear after frequent ear infections, past infections, or hearing loss that develops later can all reduce hearing. That is why hearing assessment is the first step in every child with speech delay.

2. The "late talker." Children between 18 and 30 months whose comprehension and other developmental areas are normal, but whose vocabulary remains limited. Some catch up with their peers over time; however, because it cannot be predicted in advance which child will catch up, the decision to "watch and wait" should be made together with medical follow-up, not based on the family's expectations.

3. Developmental language disorder. A condition in which there is persistent difficulty acquiring language despite normal intelligence, hearing and neurological examination; this is the group that benefits most from speech and language therapy.

4. Autism spectrum disorder. Here the delay is not limited to words alone: eye contact, responding to one's name, pointing, imitation and reciprocal interaction are also affected. If these findings accompany the speech delay, evaluation takes priority.

5. Global developmental delay. A picture in which language, motor and social areas are behind together. We covered warning signs across all areas of development in detail in our article on signs of developmental delay.

6. A stimulation-poor environment and screens. Time spent in front of a screen affects language development negatively to the extent that it replaces reciprocal conversation. In children under two, screens are not recommended apart from video calls. We also described the effects of screens on development and sleep in our article on sleep routines in children.

Time Lost by Saying "Let's Wait, It Will Sort Itself Out"

The four misconceptions I hear most often about speech delay:

  • "He's a boy, boys talk late." The difference linked to sex is very small and does not explain a marked delay.
  • "We speak two languages, that's why he's confused." Bilingualism is not a cause of delay; words may be spread across two languages, and the total vocabulary is what counts.
  • "He is tongue-tied; he'll talk once it's cut." Tongue-tie is mainly related to breastfeeding; it is not a routine explanation for speech delay.
  • "His older brother talked late too." A family history is often present, but it cannot justify postponing the assessment.

What these sentences have in common is this: they all legitimise waiting. Yet the assessment itself is harmless and most often ends with a result that reassures the family.

When Should You See a Doctor?

If any of the following applies, I recommend making an appointment for an assessment:

  • At 12 months, no babbling/cooing at all, no response to their name, no pointing
  • At 16 months, no meaningful words at all
  • At 18 months, fewer than 10 words or an inability to understand simple commands
  • At 24 months, not combining two words or being clearly below 50 words
  • At 3 years, not forming sentences or speech that is not understood by people outside the family
  • At any age: Loss of words the child used previously (regression) — this is a reason for urgent evaluation
  • Poor eye contact, not looking when called by name, absence of imitation and reciprocal play
  • No reaction to loud sounds, constantly turning up the television volume, a history of frequent middle ear infections
  • Marked blocking while speaking, repetition of sounds, or accompanying difficulty with swallowing and chewing
  • A family's nagging feeling that "something isn't right" — this feeling should be taken seriously

Talking but Hard to Understand: Pronunciation and Stuttering

Some children form sentences of age-appropriate length, but because they cannot produce the sounds correctly, what they say is hard to understand. Here the measure is not the number of words but intelligibility: about half of a 2-year-old's speech, three quarters at 3 years, and almost all of it at 4 years is expected to be understood by someone outside the family. It is normal for certain sounds such as "R" and "S" to be mastered later; however, if the child is so hard to understand that they cannot communicate with unfamiliar people, an assessment is needed.

Disruptions in the flow of speech are a separate topic. Between the ages of 2 and 5, short-lived repetitions that occur because the child thinks fast and speaks slowly are usually temporary. However, if the blocking lasts longer than six months, is gradually increasing, if the child shows accompanying movements such as struggling, facial tension or eye blinking while speaking, or if they start avoiding speaking, they should definitely be evaluated. During this period, telling the child "speak slowly", "take a deep breath" or "say it again from the start" is generally not helpful; listening patiently, not interrupting, and slowing down your own rate of speech is more effective. Because tension around the child's speech may later affect their self-confidence and social relationships, early support is important.

How Is the Assessment Carried Out?

The examination looks at the following, in order:

  1. Detailed history: Pregnancy and birth, hearing screening result, past infections, family history of speech and language problems, the language environment at home and screen time.
  2. Developmental screening: Standard screening tests that show whether areas other than language are also age-appropriate.
  3. Hearing assessment: If there is any suspicion, an age-appropriate audiological test is requested; this step must not be skipped.
  4. Physical and neurological examination: Mouth and palate structure, muscle tone, neurological findings.
  5. Referral: If deemed necessary, an assessment by a speech and language therapist, paediatric neurology or child psychiatry is planned.

The most suitable setting in which these steps are routinely reviewed is the well-child visits carried out at regular intervals. Developmental screening is a natural part of these check-ups; this way, a delay can be caught before the family even notices it.

Ways to Support Language Development at Home

Whether or not therapy is needed, the language environment at home is the strongest support:

  • Speak face to face and at eye level. Seeing your mouth makes it easier for the child to learn sounds.
  • Narrate the day out loud. Put what you are doing into words, such as "now we're putting on your sock, the blue sock".
  • Expand the sentence by one step. If your child says "water", you say "you want water"; if they use two words, extend it to three.
  • Don't correct — repeat the correct form. Instead of "that's not how you say it", say the word again in its correct form.
  • Offer choices instead of asking questions. "Milk or water?" makes it easier for the child to speak than "What do you want?"
  • Open a book every day. You don't have to read from the picture book; talking about the pictures is enough.
  • Wait. Staying silent for 5-10 seconds after asking a question gives the child time to answer; if we hurriedly finish for them, the need to speak disappears.
  • Don't give them what they want immediately. When they point with their finger, wait first for a sound or a word; encourage communication.
  • Limit screens. Speech coming from a screen is not reciprocal; language is learned through mutual interaction.

In Summary

The main rule in speech delay is this: if you are not sure, ask. For most families the assessment ends with "everything is fine, let's keep following up"; and if there really is a delay, the most valuable gain is starting early. There is no benefit to waiting, and no harm in asking.

In Gaziantep, you can make an appointment to have your child's speech and language development assessed against age-appropriate milestones and, if needed, to plan a hearing test and appropriate referral. You can find examination, address and directions information on our paediatric health and diseases clinic page.