Baby Language & Communication Development

Language Starts Earlier Than You Think

Your baby has been listening to language since the third trimester. By birth, they already recognise the sound of your voice and can distinguish their mother tongue from other languages. This is not a metaphor for bonding — it is measurable neurological processing.

The first year of life is the most sensitive period for language acquisition the brain will ever experience. The connections forming in your baby's brain during this time are laid down through exposure and interaction — not through apps, programmes, or structured learning, but through the ordinary daily experience of being talked to by people who love them.

Communication Milestones: Birth to 24 Months

Communication development encompasses both what your baby understands (receptive language) and what they can express (expressive language). Receptive language typically runs several weeks to months ahead of expressive language throughout the first two years — your baby will understand far more than they can say.

Birth to 3 months

• Startles at loud sounds; settles to familiar voices
• Makes eye contact and quiets when spoken to
• Begins to coo and make vowel sounds in response to interaction
• Smiles socially from around 6–8 weeks

3 to 6 months

• Turns toward the source of sounds and voices
• Laughs and vocalises with increasing intentionality — seeking a response
• Begins to respond differently to different tones of voice (happy, firm, worried)
• Listens with apparent interest when you speak

6 to 12 months

• Babbling begins — repetitive consonant-vowel combinations ("ba-ba," "da-da," "ma-ma")
• Uses babble with different intonation patterns — some sound like questions, some like statements
• Responds to their own name by 9 months
• Begins to understand frequently used words ("no," "bye-bye," family names)
• Points at things of interest by around 12 months — a crucial social-communication milestone
• May say first word toward the end of this period, though 12–14 months is the more typical window

12 to 24 months

• Vocabulary grows from a handful of words to 50 or more by 18–24 months
• Word combinations begin to emerge around 18–24 months ("more milk," "daddy gone")
• Follows simple two-step instructions without gesture by around 18–24 months
• Understands many more words than they can produce — the expressive/receptive gap narrows over time
• Points at pictures in books when named

What You Can Do to Support Language

The most important thing to know about supporting your baby's language development is that the quality of interaction matters far more than the quantity of vocabulary you expose them to. A rich back-and-forth exchange — even before they can respond verbally — is more valuable than any amount of one-way talking.

Talk to them, constantly

Narrate your day. Describe what you are doing, what you can see, how things feel. It does not need to be sophisticated — "we're putting your socks on now, one sock, two socks, that's the warm one you like" is exactly right. The repetition, the physical context, and the tone all contribute to language learning.

Respond to their communication attempts

When your baby coos, babbles, or gestures, respond as if they have said something meaningful — because they have. This conversational back-and-forth (sometimes called "serve and return") is one of the most robustly evidenced language-supporting interactions you can have. Pause after you speak. Give them space to respond. Treat it as a conversation, even when they cannot yet take a turn verbally.

Follow their attention

When your baby points at or looks at something, join their attention and name it. This is joint attention, and it is the mechanism through which babies map words to objects. Following their interest rather than directing it to something else is significantly more effective for word learning.

Read together from birth

Reading aloud — even board books, even when your baby seems disinterested — exposes them to vocabulary they would not encounter in ordinary conversation, to narrative structure, and to the rhythms of written language. By six months, many babies show clear interest in books; by twelve months, many have firm favourites.

Sing and use rhymes

The rhythm and repetition of nursery rhymes and songs are particularly effective for phonological awareness — the ability to hear and process the sound structure of language. This is a foundational skill for later reading. You do not need to be musical. The value is in the repetition, the interaction, and the joy.

Screen Time: What the Evidence Actually Says

The guidance from the WHO and most major paediatric bodies recommends no screen time for children under 18–24 months (with the exception of video calls with family), and limited, high-quality co-viewed content for toddlers from 2 years. The evidence base for this is specifically around passive, solo screen exposure replacing interactive human interaction — not around the guilt-inducing scenarios most parents actually encounter.

Background television that nobody is actively watching, occasional CBeebies while you make dinner, or a video call with grandparents are qualitatively different from a child sitting alone with a tablet for extended periods. Most real-world screen time falls into the former category.

When to Ask for a Referral

Speech and language therapy referrals are available on the NHS through your health visitor or GP. Many families wait longer than they need to before seeking one — often because of reassurance that "they'll get there" or anxiety about what a referral might mean. The evidence is consistent: early intervention for language delays produces better outcomes than waiting. A referral is not a diagnosis.

When to mention something to your health visitor

• By 12 months: not pointing, not babbling, not responding to their name
• By 18 months: fewer than 10 recognisable words, not following simple instructions
• By 24 months: fewer than 50 words, not yet combining two words, not following two-step instructions
• At any age: loss of previously acquired words or skills, or a nagging sense that something is not quite right

Bilingual and Multilingual Families

Raising a child with more than one language is one of the greatest gifts you can give them — and it carries no developmental risk. Bilingual children may have slightly smaller vocabularies in each individual language compared to monolingual peers, but their total vocabulary across languages is equivalent or larger. They may also reach some expressive milestones slightly later, but this is within normal developmental variation, not a delay.

The most effective approach for bilingual families is one parent, one language — each primary caregiver speaking consistently in their own strongest language. This is not a rule, but it does tend to produce more robust bilingual outcomes than mixing languages within single conversations.