Language Development Red Flags Checker
Is your child's speech and language development on track? Select their age to review expected milestones and check for red flags — from first coos at 2 months to full storytelling at 5 years. Based on CDC and ASHA guidelines. All data stays on your device.
Choose the checkpoint that matches or is just past your child's current age.
Your inputs never leave your device. All calculations happen locally.
Medical disclaimer: This tool is for informational purposes only. It does not constitute medical advice. Always consult your pediatrician or healthcare provider with any health concerns.
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Language Development by Age — Quick Reference
| Age | Vocabulary | Expression | Comprehension |
|---|---|---|---|
| 2 months | Cooing | Reacts to voices | Calms to familiar voice |
| 6 months | Babbling begins | 'Bababababa' | Responds to name |
| 12 months | 1–3 words | 'Mama', 'dada' with meaning | Understands 'no', 2–3 words |
| 18 months | 10–25 words | Names familiar objects | Follows 1-step commands |
| 2 years | 50+ words | 2-word phrases | Points to body parts |
| 3 years | 200–1000 words | 3-word sentences | Hears 2-step directions |
| 4 years | 1500+ words | 4–6 word sentences | Understands most of what is said |
| 5 years | 2000+ words | Full grammar mostly correct | Stories, fantasy vs. real |
Source: ASHA (American Speech-Language-Hearing Association), CDC milestones 2022.
How to Boost Your Child's Language at Every Age
📖 Read together daily
Daily reading is the single most evidence-backed thing you can do. Start from birth — even before babies understand words, they absorb rhythm, vocabulary, and turn-taking.
🔄 Expand their utterances
Baby says 'ball' — you say 'yes, big red ball!' or 'the ball rolled away!' This technique (called expansion) accelerates vocabulary and grammar simultaneously.
🗣️ Narrate your day
Talk through everything you're doing. 'Now I'm putting your shoes on. First the left one, then the right.' Rich input from caregivers is the strongest predictor of vocabulary at age 3.
📺 Limit solo screen time under 2
The AAP recommends no screen media (except video calls) for children under 18 months. Screen time displaces the back-and-forth interaction that language requires.
🎵 Sing and rhyme
Songs and nursery rhymes build phonological awareness — the foundation for reading. Repetition matters; familiar songs are better than constant new content.
💬 Follow their lead
Comment on what your child is interested in, rather than directing their attention. Child-directed interaction leads to faster vocabulary growth than adult-directed instruction.
Frequently Asked Questions
What is a speech and language delay?▾
A language delay means a child isn't meeting the expected communication milestones for their age. This might involve using fewer words than typical, not combining words when expected, being difficult to understand, or struggling to understand spoken language. Speech delays (articulation) and language delays (vocabulary, grammar, comprehension) are different but often co-occur. Both are very common — affecting about 1 in 5 children — and both respond well to early intervention.
Is it 'wait and see' or see a specialist right away?▾
The American Speech-Language-Hearing Association (ASHA) recommends evaluation, not waiting, if a child isn't meeting language milestones. There used to be a common 'wait and see' approach, but research has shown clearly that early intervention leads to significantly better outcomes. If your child is under 3 and you have concerns, you can contact your state's Early Intervention program directly — you don't need a doctor's referral in most US states.
Could it just be 'late talking'?▾
Some children who talk late have no other developmental concerns and simply have a delay in expressive language — they're called 'late talkers.' Studies show that many late talkers do catch up by age 5 without intervention. However, because language delay can also be the first sign of autism, hearing loss, intellectual disability, or other developmental differences, every late talker deserves evaluation rather than watchful waiting. The evaluation can confirm whether it's a simple delay or something needing more support.
How can I support my child's language development at home?▾
The most evidence-based approach is responsive, child-directed talk: face your child, make eye contact, respond to their attempts to communicate, narrate what you're doing, expand their sentences (if they say 'ball', you say 'yes, red ball!'), reduce questions (statements and comments are more effective than interrogations), and read together daily from the very first weeks. Limiting screen time and increasing face-to-face interaction is supported by strong evidence. Quality of language input matters more than quantity.
Could a hearing problem be causing the language delay?▾
Yes — hearing loss is one of the most common, identifiable, and treatable causes of language delay. Even mild or fluctuating hearing loss (from repeated ear infections / otitis media) can interfere significantly with language development. If your child has had multiple ear infections, snores, or seems not to respond to sound consistently, request a formal audiological evaluation. Most children have newborn hearing screening, but hearing issues can develop over time.
Is language delay a sign of autism?▾
Language delay is one of the early signs of autism spectrum disorder (ASD), but most children with language delays do not have autism. Key differences: autistic children also show reduced social engagement, limited eye contact, not pointing to share interest, repetitive behaviours, and restricted interests. The CDC recommends autism-specific screening (M-CHAT-R) at 18 and 24 months for all children — not just those with language concerns.
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From the Blog
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Related Tools
Baby Milestone Checker
CDC developmental milestone checklist.
Developmental Red Flags Checker
Is my toddler developing normally?
Walking Age Predictor
Normal range for when babies start walking (9–18 mo).
First Words Timeline
When should my baby say their first word?
Gross Motor Development Tracker
Rolling, sitting, crawling, walking milestones by age.
From the Blog
Early Intervention: What It Is and How to Access It for Your Child
Milestones & Development · 9 min
Toddler Social Development: Milestones, Play Stages, and When to Seek Help
Milestones & Development · 9 min
When Do Babies Start Talking? Language Milestones 0–24 Months
Milestones & Development · 10 min
Cognitive Development in Babies: How Your Baby's Brain Is Growing
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