Language Development Milestones from 0 to 5

Parents are often given milestones as if they were deadlines. “Fifty words by two.” “Sentences by three.” It is easy to start counting, comparing with the child next door, and worrying.

Milestones are better treated as a rough map. Children develop at different rates, and a few weeks either side of a typical age is rarely meaningful on its own. What matters more is the overall direction: is your child steadily understanding more, communicating more, and finding new ways to connect with you?

The ages below draw on guidance from I CAN (the children’s communication charity now called Speech and Language UK), the NHS and Action for Children. They describe what many children do at around each age, not what every child must do.

Understanding comes before talking

At every stage, children understand far more than they can say. A toddler who uses twenty words may understand a few hundred. This is worth keeping in mind, because understanding is easy to overlook. A child who follows simple instructions, points to things you name and responds to their own name is building strong foundations, even if they are not saying much yet.

Communication also includes much more than words: eye contact, pointing, gestures, facial expressions, turn-taking and play.

Birth to 12 months

In the first year, babies are tuning in to the sounds and rhythms of the language around them.

• In the first few months they startle at loud noises, recognise a parent’s voice, and make cooing sounds.
• From around three to six months they watch faces when you talk, laugh, and make sounds to get your attention.
• Between six and twelve months they babble, respond to their name, understand familiar words such as “no” and “bye bye”, and begin to wave and point.
• First words often appear around their first birthday.

Babies learn most from being talked to directly: face-to-face chat during feeding, changing, bath time and play. They do not need special toys or programmes.

12 months to 2 years

This is a period of rapid change, and the range between children is wide.

• At around 12 to 15 months, many children say roughly ten words, though not always clearly, and understand far more.
• By around 18 months, they typically use at least twenty words, point to pictures in books, copy adults and begin simple pretend play.
• Between 18 months and two years, children may understand somewhere between 200 and 500 words. Many use about 50 words by their second birthday and begin putting two words together, such as “more milk” or “daddy gone”.

Frustration is common at this age because children know what they want but do not yet have the words for it. Tantrums often ease as language grows.

2 to 3 years

Vocabulary grows quickly. By around three, I CAN’s guidance describes children using roughly 300 words and linking four or five words together.

• They understand simple ideas such as “in”, “on” and “under”.
• They begin asking questions, often lots of them, using words like “what”, “where” and “who”.
• Speech sounds are still developing. Some sounds will be missing or swapped, and that is expected.
• They enjoy simple stories and begin to join in with other children’s play.

3 to 4 years

• Children typically speak in sentences of four to six words.
• They follow two-part instructions, such as “get your coat and stand by the door”.
• They begin using past and future tense, though with plenty of mistakes. “I runned” is a sign that a child has noticed a grammar rule and is applying it a little too widely.
• They start conversations and can talk about things that are not in front of them.
• By around three and a half, Action for Children notes that speech should usually be clear enough for most people to understand.

4 to 5 years

By the time many children start Reception, they:

• speak in well-formed sentences
• understand stories without needing pictures
• ask what new words mean
• use language to plan play, negotiate with friends and share opinions
• follow instructions without needing to stop what they are doing

Some speech sounds, such as “th” and “r”, may still be developing at five and beyond. That is normal.

How you can help at any age

You do not need flashcards. Everyday talk, done often, is what makes the difference.

• Get down to your child’s level and follow their interest. Talk about what they are looking at.
• Comment more than you question. “You’ve got the red car. It’s going fast!” invites a child in without testing them.
• Add a word. If your child says “dog”, you might say “big dog” or “dog running”.
• Leave pauses. Children need time to respond, and many adults fill the silence too quickly.
• Read, sing and share rhymes, in whatever language your family speaks.
• Reduce background noise. A TV on in the background makes it harder for young children to pick out speech.

Serve and Return explains why these back-and-forth exchanges matter so much for early brain development. If your family speaks more than one language, see Raising Bilingual Children. Bilingual children reach milestones within the same broad range, though their words may be spread across languages.

Checks in England

In England, health visitors offer a development review when children are around two to two and a half years old, which includes communication. Early years settings also carry out a progress check at age two under the Early Years Foundation Stage framework. These are good opportunities to raise any questions, even small ones.

When to get help

Trust your instincts. You know your child well. Speak to your health visitor or GP, or to your child’s nursery or school SENCO, if your child:

• does not seem to respond to sounds or to their name
• is not babbling, pointing or waving by around their first birthday
• has very few words by 18 months to two years, or is not putting words together by around two and a half
• has trouble understanding simple instructions for their age
• is very hard for familiar adults to understand by around three and a half
• stammers in a way that worries them or you
• loses words or skills they used to have

In many areas, parents can refer their child directly to the local NHS speech and language therapy service. Your health visitor can tell you how it works where you live. A hearing test is often a sensible first step, because even mild or temporary hearing loss, such as from glue ear, can affect speech.

Losing skills that a child previously had always deserves prompt attention, so do not wait for a routine check if you notice this. For practical ways to support a child who has already been identified with speech, language or communication needs, see Speech and Language Needs at Home.

Further reading

• I CAN (now Speech and Language UK). Stages of speech and language development (poster, published on the Welsh Government website). gov.wales.
• Let’s Talk, NHS Scotland. Typical development: 18 months to 3 years. lets-talk.scot.nhs.uk.
• Action for Children, Parent Talk. Communication milestones for young children: speech and language. parents.actionforchildren.org.uk.
• Speech and Language UK. Information for parents. speechandlanguage.org.uk.
• Department for Education (2024). Early Years Foundation Stage statutory framework. gov.uk.

Cover image: Photo by Picsea on Unsplash.