By Little Words Editorial · Editorial standards · Updated August 10, 2026
What are the ASHA speech milestones?
ASHA's developmental milestones cover communication from birth to 5, split into age bands, each with checklist items a parent can actually observe [1]. A few load-bearing examples from the bands parents ask about most:
- 13 to 18 months: shakes head for no and nods head for yes; understands and uses words for common objects, some actions, and people [2].
- 19 to 24 months: uses and understands at least 50 different words for food, toys, animals, and body parts; puts two or more words together, with examples like more water and go outside [3].
- 2 to 3 years: uses word combinations often, sometimes repeating words or phrases; correctly produces p, b, m, h, w, d, and n in words, and most vowels [4].
Notice what those items are: bands and criteria, not exact scores. The checklist phrase at least 50 different words is a criterion for the 19 to 24 month band, not an average your child is graded against. That distinction is the whole trick to reading milestones sanely.
How wide is normal at each age?
Wider than most milestone lists let on. The best public view of this comes from the MacArthur-Bates Communicative Development Inventories, the parent-report vocabulary instrument, compiled at scale through Stanford's Wordbank project and analyzed for parents by ParentData (updated February 18, 2026) [5].
Milestone numbers with the dataset named (MacArthur-Bates CDI via Wordbank, per ParentData):
- At 24 months, children may have anywhere from 50 to 500 words and still fall within the distribution [5].
- At 16 months, a child at the 10th percentile has only about two words, while a child at the 90th percentile has over 150 [5].
Single-number milestone claims hide that spread. Any page that tells you a 24-month-old should say one specific word count is compressing a 10x range into a scare number.
NIDCD's federal checklist reads the same way, in bands: between ages 1 and 2, a child acquires new words on a regular basis, puts two words together like more cookie, and follows simple commands like roll the ball [6].
Are milestone checklists tests my child can fail?
No, and the people who build them say so. ParentData's bottom line on the milestone data is blunt: developmental milestones are screening tools, not performance benchmarks; they help identify children who may benefit from early intervention [5]. The CDC maintains its own checklist for each age for exactly this screening job, like its 18 month checklist [7].
So use a checklist the way a screener is meant to be used. If your child shows the items for their band, carry on. If items are missing, that is not a diagnosis. It is a trigger to ask someone whose job is to look closer.
When should you stop watching and ask for help?
This is where a cutoff, clearly labeled as a cutoff, is genuinely useful. The American Family Physician review of speech and language delay (August 2023) lists a vocabulary of fewer than 50 words at 24 months or older, or no word combinations, as a concerning presentation that warrants referral [8]. The same review is unusually direct about timing: watchful waiting is not recommended for late talkers [8].
Read that number for what it is. It is a screening cutoff clinicians act on, not a population average and not a prediction about your child. Plenty of children above the cutoff still benefit from help, and an evaluation is how you find out either way.
How common are late talkers?
Late language emergence is ASHA's term for a delay in language onset with no other diagnosed disabilities or developmental delays. Its practice portal reports that prevalence estimates of LLE in 2-year-old children primarily range between 10% and 20% [9]. That is a prevalence range for one defined construct. It answers how many children start late, which is a different question from any referral cutoff, and the two numbers should never be blended into one claim.
What does an evaluation look like, and what does it cost?
| Your situation | The move |
|---|---|
| Under age 3 in the US | Contact your state early intervention program. The AAP describes early intervention as a federal- and state-funded program that helps children and their families [10]. |
| Age 3 or older | Ask your public school district about a speech and language evaluation, and talk with your pediatrician about referrals. |
| Development seems delayed, any age | The AAP's standing advice: tell your child's doctor [10]. |
| Child meets the fewer-than-50-words cutoff above | Ask now. The AFP review says not to wait and watch [8]. |
| Everything checks out but worry lingers | Asking costs a phone call. An evaluation answers the question either way; our toddler not talking hub walks through the process. |
What this page can and cannot tell you
This page can show you what ASHA's checklists contain, how wide typical really is with the dataset named, and which cutoffs clinicians act on. It cannot evaluate your child, and it will not pretend a checklist can. If your toddler is around the 2-year mark, our month-by-month pages, like 25 months and 28 months, apply this same range-first reading to a single age. Home practice supplements professional care; it never replaces it.
How Little Words fits between checkups
Little Words is a voice-first practice app, built by a dad, for kids ages 2 to 8, with support through age 10. Kids play and talk with Buddy, so quiet days still carry spoken practice. It does not screen, diagnose, or replace an SLP. If a checklist item is missing, the move is an evaluation; the app is for the practice that happens around it.
Questions parents ask about ASHA milestones
What are the ASHA speech milestones?
ASHA publishes communication milestone checklists from birth to 5, organized in age bands. Examples: shakes head for no and nods for yes at 13 to 18 months; uses and understands at least 50 different words and puts two or more words together at 19 to 24 months; uses word combinations often at 2 to 3 years.
How many words should a 2 year old say?
There is no single correct number. In MacArthur-Bates CDI data compiled through Stanford's Wordbank project, 24-month-olds may have anywhere from 50 to 500 words and still fall within the distribution. ASHA's 19 to 24 month checklist uses at least 50 different words as its criterion.
Are milestone checklists tests my child can fail?
No. They are screening tools. ParentData's analysis of the milestone data puts it plainly: developmental milestones are screening tools, not performance benchmarks. A missing checklist item is a reason to ask a professional, not a verdict about your child.
When is a late talker actually a concern?
Clinicians act on cutoffs rather than vibes. The American Family Physician review lists a vocabulary of fewer than 50 words at 24 months or older, or no word combinations, as a concerning presentation, and states watchful waiting is not recommended for late talkers. If that describes your child, ask for an evaluation now.
How common is late language emergence?
ASHA's practice portal reports that prevalence estimates of late language emergence in 2-year-old children primarily range between 10% and 20%. That figure describes late language onset without other diagnosed disabilities. It is a different measure from any referral cutoff, so the two should not be blended.
Sources
How this page was checked: every checklist item was compared against the linked ASHA and NIDCD pages, the distribution figures against ParentData's Wordbank analysis, and the referral guidance against the AFP 2023 review, all on August 10, 2026. Numbers are shown as ranges or labeled cutoffs, matching how each source publishes them.
- ASHA: Developmental Milestones, Birth to 5 Years: the milestone checklist hub for communication, hearing, speech, and language. Accessed August 10, 2026
- ASHA: Communication Milestones, 13 to 18 Months: shakes head for no and nods head for yes; understands and uses words for common objects. Accessed August 10, 2026
- ASHA: Communication Milestones, 19 to 24 Months: uses and understands at least 50 different words; puts two or more words together. Accessed August 10, 2026
- ASHA: Communication Milestones, 2 to 3 Years: uses word combinations often; correctly produces p, b, m, h, w, d, and n in words. Accessed August 10, 2026
- ParentData (Emily Oster, PhD): How Many Words Should Kids Say? And When?: MacArthur-Bates CDI data via Stanford's Wordbank; 24-month range 50 to 500 words; 16-month percentile spread; milestones as screening tools. Updated February 18, 2026; accessed August 10, 2026
- NIDCD: Speech and Language Developmental Milestones: band checklist from birth to 5; ages 1 to 2 include puts two words together and follows simple commands. Last updated October 13, 2022; accessed August 10, 2026
- CDC: Learn the Signs. Act Early. 18 Month Milestone Checklist: CDC's age-specific screening checklist; linked as the screening tool it is. Accessed August 10, 2026
- American Family Physician (August 2023): Speech and Language Delay in Children: fewer than 50 words at 24 months or older, or no word combinations, as a concerning presentation; watchful waiting not recommended for late talkers. Accessed August 10, 2026
- ASHA Practice Portal: Late Language Emergence: LLE defined as language delay without other diagnosed disabilities; prevalence estimates in 2-year-olds primarily range between 10% and 20%. Accessed August 10, 2026
- HealthyChildren.org (AAP): Language Delays in Toddlers: early intervention described as a federal- and state-funded program; tell your child's doctor if development seems delayed. Last updated April 30, 2021; accessed August 10, 2026