Speech vs. language: What parents need to know

You know your child better than anyone, so you recognize when something feels off. Are they not talking enough? Or talking plenty but not connecting their ideas or jumbling up their sentences? Here's something that could help to understand and figure out what might be going on: speech and language are actually two different things. 

Wait, aren't speech and language the same thing?

Nope! You're definitely not alone in thinking they are, most people use the words interchangeably. But for families trying to figure out what's going on with their child, the distinction is very useful. Speech is the physical act of making sounds, and language is the system we use to make meaning. One is about the mouth; the other is about the mind. 

What is speech?

Speech is the mechanical, physical side of communication; the sounds your mouth, tongue, lips, and breath make together. When children have speech difficulties, they may struggle to say certain sounds correctly or have trouble making their speech clear and understandable to others.

Your three-year-old says "I wuv wions" instead of "I love lions." While it is very cute, it is a speech error. They know what a lion is and they want to tell you they love them, but they just haven't learnt the "l" sound yet. Their language is totally intact, their speech is still catching up.

Speech difficulties can also involve fluency (for example, stuttering) or voice, such as speaking too quietly or with an unusual tone. Some children also have trouble stringing sounds together in the right order, for example saying "pasketti” for “spaghetti”.

The key thing to remember is that your child might know exactly what they want to say, and exactly what words to use, they just have a hard time making the sounds come out clearly.

What is language? 

Language is the whole system of meaning that sits behind the words. It includes the words we know (vocabulary), how we put them together (grammar and sentence structure), whether we understand what's said to us (comprehension), how we have a back-and-forth conversation, and non-verbal communication (gestures, eye contact, reading the room).

Language is split into two main parts. The first part is expressive language which is what your child says. Your four-year-old points at the dog and says "dog go!" instead of "The dog ran away." They have the idea, but the sentence structure isn't quite there yet. That's their expressive language development at work.

The second main part is receptive language which is what your child understands. You ask your five-year-old to "go to the kitchen, open the fridge, and grab the orange juice." They go to the kitchen, open the fridge, stare blankly, then come back and report "I don't know." They understood some steps of the instruction, just not all three steps at once. That's receptive language, and it's very important to pay attention to. 

There is also pragmatic language which is the social side of language. Does your child take turns in a conversation? Do they understand that you don't start talking about dinosaurs in the middle of someone else's sentence? Do they use gestures or make eye contact to fill in the gaps? For example, your child has great vocabulary and clear speech but at playdates, they talk at their friends rather than with them, dominating every conversation with Minecraft facts regardless of whether anyone asked. That's a pragmatics difficulty. 

In short, language difficulties aren't about the sounds, they're about the meaning, the understanding, the connection, and the back-and-forth communication.

What does this mean for your child?

A child can have difficulties with speech and have no language difficulties. They might say "wabbit" instead of "rabbit," but they know exactly what a rabbit is, how to ask for one, and how to tell you a full story about the one they saw in the garden.

A child can have difficulties with language and have perfectly clear speech. Every sound is crisp and beautiful, but they struggle to follow multi-step instructions, they don't have many words, or conversations feel one-sided. Or (and this is also very common) they can have both speech and language difficulties.

If you find yourself thinking "I can understand what they're saying, but I'm not sure they're understanding me", that's a sign that they are having language difficulties. If you think "they seem to understand everything, but I can't always make out what they're trying to say”, that’s a sign that they are having speech difficulties. Both speech and language difficulties are important and are worth exploring with a Speech-Language Pathologist.

The kinds of things parents notice

On the speech side, you might notice that other adults can't understand your child even when you can, that certain sounds are consistently swapped or left out (for example, "tat" for "cat," "doo" for "zoo"), or that speech sounds choppy and effortful, with a lot of repetition of sounds or words. A useful rule of thumb is that by age three, strangers should be able to understand roughly three-quarters of what your child says. If that's feeling like a stretch, it's worth a conversation with a speechie.

If you're wondering what speech development typically looks like at different ages, Speech Pathology Australia provides helpful communication milestone guides for children from birth to five years.

On the language side, you might notice that your child has fewer words than other kids the same age or that words that they used to use have disappeared. They might struggle to follow instructions, especially ones with multiple steps. Sentences might be very short, or grammar might seem unusually delayed. Conversations might feel one-directional with lots of talking, but not much back-and-forth. They might not use many gestures or avoid eye contact in ways that feel significant. They might seem to get lost in group conversations or social situations.

None of these things alone is cause for alarm, and children develop at wildly different rates. But if several of them sound familiar, it's worth getting an assessment. 

For practical everyday information written specifically for Australian families, Raising Children Network has excellent resources on speech and language development.

This is where a Speech-Language Pathologist comes in

If you're reading this, there's a good chance that your parental gut feeling has kicked in, and that feeling is worth listening to. An SLP is trained to figure out exactly this kind of puzzle.

An SLP doesn't look at just speech or language in isolation. They look at the whole picture, how your child makes sounds, how they use words, how they understand the world, how they connect with other people. They're like a detective for communication, and they come equipped with the tools to figure out what's actually going on.

An SLP can assess whether the difficulty is with speech, language, or both, and how it affects your child's day-to-day life. They can put your child's skills in context with what's typical for their age, not to alarm you, but to give you real information. Crucially, they can give you an informed plan rather than the dreaded "wait and see" as a default answer.

The earlier a difficulty is identified, the better the outcomes tend to be. But "early" is relative. It's never too late to seek support, and an SLP assessment can be genuinely valuable at any age. Speech Pathology Australia specifically encourages families not to simply “wait and see” if communication concerns persist.

If something feels off, you don't have to figure it out alone. You don't have to know whether it's speech or language or something else entirely. That's what SLPs are for. You've already done the hard part by paying attention. 

If you’re concerned about your child’s communication development, you can learn more about our assessment process or make a referral here.