Speech and language milestones — what's normal, when to worry

"My neighbour's child was talking in full sentences at two. Mine barely says five words. Is something wrong?"

We hear this from parents every week. The honest answer: most children who are late talkers catch up on their own. But some do not, and for that group, early intervention makes a big difference. This article helps you tell which is which.

Speech vs language — they are not the same

Two terms that get mixed up:

• Speech is how sound is produced — clarity, pronunciation, fluency.
• Language is the understanding and use of words — vocabulary, sentence structure, ability to follow instructions.

A child can have good speech but poor language (talks clearly but doesn't understand you), or good language but poor speech (understands everything but hard to understand when they talk). Both matter, and both develop on separate schedules.

Milestones by age

These are rough averages from major paediatric guidelines. Individual variation is normal — but if your child is significantly behind on multiple milestones, it warrants a look.

By 12 months

• Babbles with tone that sounds like real speech
• Says a few words like "mama", "dada"
• Responds to their name
• Understands simple words like "no" and "bye-bye"
• Uses gestures — waves, points, reaches up to be picked up

By 18 months

• Says at least 10-20 single words
• Points to familiar objects when named ("where's the ball?")
• Follows simple one-step commands
• Tries to imitate words you say

By 2 years

• Vocabulary of 50+ words, often 200+
• Combines two words: "more milk", "daddy go"
• Points to body parts when asked
• Follows two-step instructions ("get the book and give it to mama")
• Strangers understand about half of what they say

By 3 years

• Speaks in 3-4 word sentences
• Uses pronouns (I, you, me)
• Asks "what" and "why" questions constantly
• Names familiar people and objects
• Strangers understand about 75% of speech

By 4 years

• Tells stories and describes experiences
• Uses correct grammar most of the time
• Speech is clear enough for strangers to understand fully
• Can follow three-step instructions

By 5 years

• Speaks in complete, complex sentences
• Uses future and past tense correctly
• Can retell a story or event in sequence
• Knows and uses opposites (up/down, hot/cold)

Red flags at each age

These are the specific things that should prompt a professional evaluation.

At any age:

• Loss of previously acquired words or skills (this is urgent)
• No response to their name by 12 months
• Not making eye contact
• Not pointing or gesturing by 18 months

By 18 months:

• No words at all
• Doesn't point to show you things
• Doesn't try to imitate

By 2 years:

• Fewer than 25 words
• Not combining two words
• Doesn't respond to simple questions
• Only echoes what you say without spontaneous speech

By 3 years:

• Not speaking in sentences
• Very difficult for strangers to understand
• Vocabulary of fewer than 200 words
• Doesn't ask questions

By 4 years:

• Struggles with grammar to a degree that limits communication
• Still hard for people outside the family to understand
• Cannot tell a simple story

Common myths worth breaking

"He's a boy, they talk later." Boys do average slightly later, but not by much. This is used to explain away real delays.

"Bilingual children start talking later." Not true. Bilingual children may mix languages, but they hit total-vocabulary milestones on the same timeline as monolingual peers.

"He understands everything, just doesn't want to talk." Understanding without expression is a specific pattern (expressive language delay) that itself needs evaluation.

"Cousin so-and-so didn't talk till four and now he's fine." Yes, some late talkers do catch up. But research shows that among children who are still delayed at 30 months, less than half fully catch up without help. Early intervention shifts the odds strongly in the child's favour.

Why early matters

The window between ages 2 and 5 is when the brain is most receptive to speech-language learning. A child who gets 6 months of good speech therapy at age 3 typically progresses more than the same child would with 2 years of therapy at age 6.

This is not about pressure or perfection. It is about biology.

What causes speech delay

Broadly, it can be:

1. Isolated speech-language delay — nothing else is wrong; catches up with therapy
2. Hearing loss — even mild, intermittent hearing loss (from repeated ear infections) can delay speech significantly. Always test hearing first.
3. Autism spectrum — speech delay can be one of several signs
4. Global developmental delay — speech is one part of a broader picture
5. Selective mutism — child speaks in some settings but not others (rare)
6. Environmental factors — very low language exposure, extreme screen time

The evaluation figures out which.

What to do this week

If you are worried:

1. Get a hearing test first, even if you think hearing is fine. This one step catches a surprising number of cases.
2. Reduce screen time for the child to under 30 minutes a day. Screens are inversely correlated with language development.
3. Talk to your child constantly in your home language — narrate what you are doing, name objects, sing songs, read picture books. The volume of language a child hears directly predicts their vocabulary.
4. Book a speech-language evaluation if the child is behind for their age.

Early is better. If your child is genuinely just a late bloomer, the evaluation will reassure you. If not, you have caught it in the window when help works best.