Late Talkers vs. Speech Sound Errors: What’s the Difference and Why It Matters

When a child is harder to understand or isn’t talking as much as peers, parents often wonder: Is my child just a late talker, or is this a speech sound issue?

What Is a Late Talker?

“Late talker” is a descriptive term, not a diagnosis. It typically refers to toddlers (around 18–30 months) who have delayed expressive vocabulary but otherwise show typical development.

Research indicates that approximately 10–20% of two-year-olds are “late talkers.” These children may:

• Have fewer than 50 words by age two

• Not yet combine two words (e.g., “more milk”)

• Understand more language than they can say

What Are Speech Sound Errors?

Speech sound disorders (SSDs) occur when a child has difficulty producing certain sounds beyond the expected developmental age. Unlike late talkers, these children usually have typical vocabulary and sentence length - but their speech may be hard to understand.

For example, a child might:

• Say “wabbit” for “rabbit”

• Omit final sounds (“ca” for “cat”)

• Replace multiple sounds with one sound (e.g., “t” for “k” and “s”)

Some sound errors are developmentally typical at certain ages. Others may indicate a phonological disorder or, less commonly, childhood apraxia of speech.

When to Seek Support

Parents should consider a speech-language evaluation if:

• A child has fewer than 50 words at age two

• There is limited progress over several months

• Speech is difficult for unfamiliar listeners to understand after age three

• Frustration affects communication

Early intervention is associated with better long-term outcomes for both language delays and speech sound disorders.