Why English Sounds Are Hard for Vietnamese, Korean & Japanese Kids
Why Some English Sounds Are So Difficult: How a Child's First Language Can Affect English Pronunciation
Have you ever corrected your child's English pronunciation, asked them to repeat the word, and heard them make exactly the same sound again?
You say:
"Three."
They say:
"Tree."
You repeat:
"Thhhree."
They try again:
"Tree."
At this point, it can be tempting to assume that the child isn't listening carefully enough.
But there may be a much more interesting explanation.
The sound you are asking them to produce may not function in their first language in the same way it does in English.
For multilingual children learning English in Ho Chi Minh City, pronunciation is not simply a matter of copying what a teacher says. Their ears and mouths have spent years becoming extremely efficient at recognizing and producing the sound patterns of Vietnamese, Korean, Japanese, Mandarin, or another home language.
Then English arrives with a different collection of sounds, sound combinations, rhythms, and mouth movements.
Suddenly, the child has to learn distinctions that may not have been important in their first language.
That doesn't mean there is anything wrong with the child's speech.
It means they are learning a new sound system.
Understanding that difference can completely change the way we approach pronunciation.
Every Language Has Its Own Sound System
Languages do not simply use different words for the same things.
They also organize sounds differently.
English distinguishes between sounds such as:
r / l
f / v
s / sh
t / th
b / v
and many others.
It also allows combinations of consonants such as:
street
spring
texts
world
sixths
For a child whose first language uses different sound contrasts or different rules for how sounds can be combined, some English words can initially feel physically awkward.
Imagine being asked to produce a sound your mouth has rarely needed to make.
Then imagine being asked to hear the difference between two unfamiliar sounds, remember a new word containing that distinction, pronounce it correctly, put it into a grammatical sentence, and say the whole sentence confidently while five other people are listening.
That is a much bigger task than:
"Just say it properly."
Why Vietnamese Speakers May Find Certain English Sounds Difficult
This is particularly relevant for us at Spark because many of our students live in Vietnam and either speak Vietnamese themselves or are surrounded by Vietnamese every day.
Vietnamese and English have very different phonological systems.
One noticeable difference for English learners can involve final consonants.
English uses final sounds to distinguish between an enormous number of words and grammatical forms:
cat / cats
play / played
rice / rise
back / bag
seat / seed
If those final sounds become unclear or disappear, listeners may still understand the general sentence, but important information can be lost.
That is why a student might know the correct English word perfectly well but produce it in a way that sounds incomplete to an English listener.
English consonant clusters can create another challenge.
Words such as:
spring
street
crisps
asked
require several consonants to occur together.
A learner may simplify the cluster, insert an additional vowel, or omit a sound because their existing sound system is more accustomed to different combinations.
The problem is not intelligence.
The child may know exactly what the word means.
Their mouth is learning a new movement pattern.
The Famous English "TH"
Then we reach one of English's most notorious sounds:
TH.
Actually, English has two common TH sounds.
There is the unvoiced sound in:
think
three
Thursday
teeth
And the voiced sound in:
this
that
mother
weather
These sounds require the tongue to interact with the teeth in a way that is unfamiliar to many English learners.
Children may therefore substitute a sound that already exists comfortably in their speech system.
You might hear something resembling:
tree instead of three
or another familiar sound replacing TH.
From the child's perspective, those sounds may initially seem extremely similar.
This is why pronunciation teaching sometimes needs to begin before the word itself.
We might ask:
Where is your tongue?
Can you see it?
Can you feel the air moving?
Is your voice switched on or off?
Suddenly, pronunciation stops being an abstract instruction.
The child has something physical to change.
Why Korean Speakers Can Encounter Different Challenges
Korean-speaking children may encounter another set of differences when learning English.
A well-known example involves the English R and L distinction.
English uses these as separate sounds capable of changing the identity of a word:
right / light
rock / lock
read / lead
For learners whose first language organizes these sounds differently, distinguishing and producing the English contrast can initially require additional listening and articulation practice.
Other English consonant contrasts and consonant combinations may also be unfamiliar.
Again, repeatedly telling a child that their pronunciation is "wrong" doesn't necessarily teach them anything.
First they need to hear the contrast.
Then they need to understand how the sound is produced.
Then they need controlled practice.
Then the sound needs to appear in words.
Then sentences.
And finally:
real communication.
That last stage is incredibly important.
A child who can successfully say right, light, right, light ten times during an exercise has made progress.
But the real goal is for that distinction to remain clear when they excitedly tell you:
"Turn right at the light!"
That transfer from practice into natural speech is where pronunciation becomes communication.
Why Japanese Speakers May Hear English Differently Too
Japanese-speaking learners can encounter some similar challenges with English R and L, alongside other differences in English consonants and consonant clusters.
English allows words such as:
play
glass
street
Christmas
where consonants appear together in ways that may not match familiar Japanese sound patterns.
A learner may therefore instinctively adjust an unfamiliar English word toward a pattern that feels more natural.
This is not laziness.
In many ways, the child's brain is doing exactly what it was designed to do.
It is trying to interpret unfamiliar information through a sound system it already understands.
Learning English pronunciation means gradually building additional categories and movement patterns.
Your Child's Accent Is Not a Problem
This distinction is extremely important.
A Vietnamese child does not need to stop sounding Vietnamese.
A Korean child does not need to stop sounding Korean.
A Japanese child does not need to stop sounding Japanese.
Having an accent does not mean someone speaks English incorrectly.
English is spoken around the world in countless accents.
At Spark, the objective is not to erase a child's linguistic identity or make every student sound identical.
The useful question is:
Can other people understand them comfortably?
If the answer is yes, an accent by itself is not something we need to "fix."
If particular sound substitutions regularly cause misunderstandings, make reading aloud difficult, affect confidence, or cause the child to avoid certain words, then targeted pronunciation instruction may be useful.
The goal is intelligibility, not imitation.
Why Listening Comes Before Pronunciation
Here's something parents may not expect:
Sometimes a child cannot consistently pronounce a distinction because they are not yet consistently hearing the distinction.
Imagine I introduced two completely unfamiliar sounds and told you:
"Those are obviously different."
They may not sound obvious to you at all.
Your brain has spent your entire life learning which sound differences matter in your language.
Children learning English may therefore need explicit listening practice.
Can you hear which word I said?
light or right?
fan or van?
three or tree?
Can you identify the sound at the beginning?
Can you hear it at the end?
Can you tell whether your own pronunciation matches the model?
This is why good pronunciation teaching involves the ears as much as the mouth.
Why Phonics Can Help
There is another important connection.
Speech sounds and reading sounds are related.
When children learn phonics, they are learning relationships between sounds and written symbols.
If a child has difficulty distinguishing or producing particular sounds, those difficulties can sometimes become noticeable when reading and spelling too.
A child may need to hear:
ship
and:
sip
as clearly different words before confidently mapping those sounds to their corresponding spellings.
This is why Spark's Phonics and Literacy pathway explicitly teaches children how sounds connect to letters and spelling patterns rather than expecting them to memorize entire words visually.
For some students, strengthening sound awareness supports both clearer pronunciation and stronger literacy.
Why "Repeat After Me" Isn't Enough
There is nothing wrong with repetition.
We use it.
But repetition without understanding has limits.
Imagine a child consistently producing an English sound incorrectly.
Teacher:
"Three."
Child:
"Tree."
Teacher:
"Three."
Child:
"Tree."
Teacher:
"Listen carefully. THREE."
Child:
"TREE."
At this point, the child has practised the incorrect movement four times.
Something needs to change.
Instead, we might break the process apart.
First, listen.
Then watch.
Then identify where the tongue goes.
Produce the sound by itself.
Then add a vowel.
Then build the word.
Then use the word in a sentence.
Then use it during conversation.
This is much closer to the approach used in Spark's Speak Clearly program, where students receive direct instruction in speech sounds, mouth placement, articulation, pronunciation and fluency before applying those skills through conversation, reading, storytelling, role-play and presentations.
The Mouth Has to Learn English Too
We often think of language learning as something that happens entirely inside the brain.
Learn vocabulary.
Learn grammar.
Remember the rules.
But pronunciation involves motor learning too.
Your tongue needs to move somewhere.
Your jaw needs to open a certain amount.
Your lips may need to round.
Air needs to travel through a particular space.
Your voice may need to switch on.
Try this.
Put your fingers gently against your throat and say:
fffffff
Now say:
vvvvvvv
The mouth position is extremely similar.
But something changes.
You should be able to feel vibration during v.
That physical awareness can be enormously helpful for children.
Instead of:
"You're saying it wrong."
we can teach:
"This is what your mouth needs to do."
That is actionable.
But Spark Doesn't Stop at the Sound
This is where Speak Clearly becomes different from a simple pronunciation drill.
Imagine a student successfully learns a difficult sound.
Fantastic.
But can they use it while reading?
Can they use it during conversation?
Can they maintain it while speaking quickly?
Can they pronounce the word clearly while also thinking about grammar, vocabulary and what they want to say next?
Can they stand in front of a group and still use it?
That transfer matters.
Spark's Speak Clearly program is an eight-week, 40-lesson communication program for children ages 5–13 that combines pronunciation and articulation with listening, expressive language, vocabulary, reading fluency, storytelling, conversation and presentation skills.
The goal is not simply:
"Can you make this sound?"
It is:
"Can you communicate clearly?"
How Spark Helps Multilingual Children Speak More Clearly
When a child has difficulty with English pronunciation, we do not assume every learner needs the same correction.
We look at the individual child.
Which sounds are difficult?
Can they hear the distinction?
Where does the sound break down?
Can they produce it alone but not in a word?
Can they pronounce the word but lose clarity in a sentence?
Do they rush?
Are final sounds disappearing?
Is vocabulary limiting what they can say?
Is the problem actually pronunciation—or is the child nervous about speaking?
These questions matter because two children who both appear to "speak unclearly" may need completely different support.
Through Speak Clearly, students work on correct mouth placement, speech-sound production, pronunciation accuracy, articulation precision and intelligibility, then connect those skills to real communication.
Through Spark's ESL program, students also build the wider vocabulary, grammar, listening, sentence construction and communication skills needed to use English independently.
And when sound-to-letter knowledge is part of the difficulty, Spark's Phonics and Literacy program can strengthen the relationship between hearing sounds, decoding them in print and spelling them accurately.
Different problem.
Different support.
Why Small Classes Matter for Pronunciation
Pronunciation is difficult to teach if the teacher rarely hears the individual student speak.
This is one reason Spark keeps classes small.
A teacher needs to notice:
Was that sound accurate?
Did the student produce it once or consistently?
Did it disappear when they started speaking faster?
Are they avoiding words containing that sound?
Did they hear their own mistake?
Children also need enough speaking time to practise.
In a small group, students can listen to one another, speak individually, practise with partners, read aloud, answer questions and receive targeted feedback without spending most of the lesson silently waiting for a turn.
For communication development, speaking time matters.
What Parents Can Do at Home
If your child's first language has different sound patterns from English, the answer is not to constantly correct every sentence they say.
That can quickly make speaking stressful.
Instead, choose one sound or contrast at a time.
Listen first.
Can your child hear the difference?
Try two words:
light / right
fan / van
tree / three
Then look at the mouth.
Use a mirror.
Where is the tongue?
What are the lips doing?
Can your child feel vibration?
Practise the sound briefly, then put it into a real word.
Finally, use that word in a silly sentence.
The sillier, the better.
Pronunciation practice should make children more willing to speak, not frightened of making mistakes.
What About Vietnamese, Korean and Japanese Families in HCMC?
Ho Chi Minh City is an unusually multilingual learning environment.
Children may attend an international school in English, speak Vietnamese in the community, use Korean or Japanese at home, and interact with classmates from many different linguistic backgrounds.
That is an incredible advantage.
These children are learning how to navigate multiple languages and cultures from an early age.
But multilingualism does not mean every sound automatically transfers from one language to another.
Sometimes children need explicit help noticing a new English sound, understanding how it is physically produced, and practising it enough for the movement to become comfortable.
That is normal language learning.
And when we understand why a sound is difficult, we can teach it much more effectively.
Frequently Asked Questions
Why does my Vietnamese child struggle with some English sounds?
Vietnamese and English use different sound systems and different rules for how sounds can appear within words. English final consonants, consonant clusters and some individual sounds may therefore require additional listening and articulation practice.
Why do some Korean and Japanese speakers confuse English R and L?
The sound categories and patterns used by Korean and Japanese do not map perfectly onto the English R/L contrast. Learners may therefore need explicit practice hearing the distinction as well as learning the different mouth movements required to produce the English sounds.
Is my child's accent a problem?
Not by itself. An accent reflects a person's linguistic background. The important question is whether pronunciation interferes with understanding or prevents the child from communicating confidently. Spark focuses on clarity and intelligibility rather than trying to erase accents.
Can phonics improve pronunciation?
Phonics is primarily concerned with the relationship between sounds and written letters or spelling patterns, while pronunciation focuses on producing spoken language clearly. However, stronger awareness of individual speech sounds can support both areas, particularly for children who have difficulty hearing distinctions between similar sounds.
Should I correct every pronunciation mistake?
No. Constant correction can interrupt communication and make some children reluctant to speak. Focused practice is useful, but children also need conversations where communicating their idea matters more than producing every sound perfectly.
What is Speak Clearly at Spark?
Speak Clearly is Spark English Center Vietnam's structured pronunciation, articulation, fluency and oral-communication program for children ages 5–13. Students work on speech sounds and mouth placement alongside listening, vocabulary, expressive language, reading fluency, conversation, storytelling and presentations.
Is Speak Clearly only for ESL students?
No. It is designed for both native English speakers and English language learners who may benefit from clearer speech, stronger articulation or greater communication confidence.
Is Speak Clearly speech therapy?
No. Speak Clearly is an educational communication program rather than clinical speech-language therapy. Children with significant or persistent speech difficulties may require assessment from an appropriately qualified speech-language professional.
Final Thought: Your Child Isn't "Bad at English" Because a Sound Is Difficult
Sometimes a tiny pronunciation error receives far too much emotional weight.
A child struggles with TH.
Or R.
Or V.
They repeat it.
They still don't get it.
And eventually they decide:
"I'm bad at English."
But they aren't.
Their brain and mouth have already mastered an entire sound system—and perhaps more than one.
Now they are learning another.
The answer is not embarrassment.
It is instruction.
Help them hear the difference.
Show them what their mouth needs to do.
Give them time to practise.
Move from sounds to words.
Words to sentences.
Sentences to reading.
And finally, use those sounds where they actually matter:
in real communication.
At Spark, that is what we want pronunciation instruction to achieve.
Not children who are afraid of sounding different.
Not identical accents.
Not perfect speech.
Clearer, more confident communicators who know that their voice deserves to be heard.
Help Your Child Speak Clearly at Spark English Center Vietnam
If your child speaks Vietnamese, Korean, Japanese or another first language and finds particular English sounds difficult, the first step is identifying what is actually causing the difficulty.
Spark's Speak Clearly program works with children ages 5–13 on pronunciation, articulation, mouth placement, listening, speech clarity, expressive language, reading aloud, conversation and presentation confidence.
For students who need broader language development, Spark's ESL pathway develops speaking, listening, vocabulary, grammar, reading and writing together, while our Phonics and Literacy program strengthens sound awareness, decoding, spelling and reading foundations.
Start with an assessment so our teaching team can identify your child's strengths, the sounds or communication skills that need development, and the most appropriate pathway forward.
Different languages create different starting points. Our job is to help every child find a clear, confident English voice.
