According to research, there is wide range of “normal” with regard to when your child will master the production of the different sounds, and there is no specific age that sounds are 100% mastered. That said, these sets of norms can be helpful to decide if a child will need speech therapy to correct a sound substitution error.
Phonology
All children make predictable pronunciation errors when they are learning to talk like adults. These 'errors' are called phonological processes, or phonological deviations and are expected to be suppressed or eliminated at specific ages
Typical Phonological Development
Apraxia of Speech
10 early signs and symptoms of childhood apraxia of speech:
Pragmatic language disorder is a condition in which someone has difficulty communicating both verbally and nonverbally in social situations.
Language pragmatics is the use of appropriate communication methods in social settings. This includes things like knowing what to say, how to say it, and when to say it.
Pragmatic language is made up of three major skills:
For most toddlers and preschoolers, speech dysfluencies go away on their own after a short period of time. In other cases, dysfluencies persist and the signs of stuttering become more obvious. Getting professional help early offers the best chances for reducing stuttering. But how can parents tell the difference between typical disfluency that will go away and the early signs of non-typical disfluencies that may indicate stuttering?
Social/Pragmatic Language
What Is Pragmatic Language Disorder?
Pragmatic language disorder is a condition in which someone has difficulty communicating both verbally and nonverbally in social situations. Language pragmatics is the use of appropriate communication methods in social settings. This includes things like knowing what to say, how to say it, and when to say it. Pragmatic language is made up of three major skills: