Articulation & Phonology

L-blends Sound by Age: Is a 18-month-old Behind?

By the Little Words Editorial Team · Reviewed by the Little Words clinical team · Updated June 2026

Most children master the L-blends sound around age 4 to 6. At this age, many children have not started using the L-blends sound yet, and that is completely expected.

The L-blends sound at a glance

Usually develops: around age 4 to 6.

How it is made: Blend L smoothly with another consonant, like bl, cl, fl, gl, pl, sl.

Words to practice: blue, clap, and flag.

Short answer

It can be normal for 18 month old not to say the target sound clearly. Speech sounds emerge over time, and some sounds are later-developing. The bigger question is whether your child is building communication overall.

Look beyond one sound

Notice how your child communicates wants, refuses, imitates sounds, understands simple directions, plays, gestures, and handles frustration. A single missing sound is less concerning than a broad pattern of limited communication or loss of skills.

How to support it gently

Model the target sound inside real words your child cares about. Keep your face visible, slow the word slightly, and accept approximations. Do not turn the day into a sound test.

When to get help

If your child is hard to understand, has very few words, loses words, seems not to hear well, or becomes distressed by speech attempts, ask your pediatrician or an SLP for guidance.

Related Little Words guides

Important: Little Words is educational support for home practice. It is not a medical device, not an AAC replacement, and not a substitute for a licensed speech-language pathologist, pediatrician, early intervention program, school team, or developmental evaluation.
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