Accent vs Speech Disorder in Bilingual Toddlers
Medically reviewed by Dr. Emily Torres, PhD, CCC-SLP · Pediatric Speech-Language Pathologist
Content reviewed against published ASHA, AAP, NIH guidelines
Last reviewed:
Speech and communication milestones vary widely, and worries about accent vs speech disorder in bilingual toddlers, here is what you need to know.
The short answer
When toddlers grow up hearing more than one language, they naturally blend sounds, patterns, and accents from both languages. This is normal and healthy, not a speech disorder. A bilingual child may pronounce some sounds differently than monolingual peers because they are learning the sound systems of two languages simultaneously. True speech disorders affect both languages equally, while accent influence appears only in specific sounds borrowed from one language to another.
Key takeaways
- When toddlers grow up hearing more than one language, they naturally blend sounds, patterns, and accents from both languages. This is normal and healthy, not a speech disorder. A bilingual child may pronounce some sounds differently than monolingual peers because they are learning the sound systems of two languages simultaneously. True speech disorders affect both languages equally, while accent influence appears only in specific sounds borrowed from one language to another.
- Usually normal when: Mixing words from two languages in a single sentence (code-switching)
- Call your doctor if: Your child has lost words or language skills they previously had in either language
- Varies by age — see the age-by-age breakdown below
This is one of the most common questions parents ask. Searching for answers means you care.
What Parents Should Know
According to ASHA, AAP, NIH guidelines, when toddlers grow up hearing more than one language, they naturally blend sounds, patterns, and accents from both languages. This is normal and healthy, not a speech disorder. A bilingual child may pronounce some sounds differently than monolingual peers because they are learning the sound systems of two languages simultaneously. True speech disorders affect both languages equally, while accent influence appears only in specific sounds borrowed from one language to another. At 12-18 months, at this stage, bilingual babies may babble using sounds from both languages. They might say their first words slightly later than monolingual peers, but this is within normal range. The total number of words across both languages combined should be assessed, not just words in one language. A bilingual baby who says 5 words in English and 5 in Spanish has a 10-word vocabulary. It is generally considered normal when mixing words from two languages in a single sentence (code-switching). However, you should contact your pediatrician promptly if your child has lost words or language skills they previously had in either language.
Normal vs. Concerning
By Age
What to expect by age
12-18 months
At this stage, bilingual babies may babble using sounds from both languages. They might say their first words slightly later than monolingual peers, but this is within normal range. The total number of words across both languages combined should be assessed, not just words in one language. A bilingual baby who says 5 words in English and 5 in Spanish has a 10-word vocabulary.
18-24 months
Toddlers commonly mix languages within a single sentence (called code-mixing or code-switching). This is a sign of bilingual competence, not confusion. They may use a word from Language A when speaking Language B because they learned that word first in that language. Pronunciation may include sounds from both languages. For example, a child learning Spanish and English may roll their "r" sounds in English words.
2-3 years
By this age, bilingual children typically begin separating their languages more clearly and can adjust which language they speak based on who they are talking to. Some accent influence between languages is completely normal and may persist for years. A true speech sound disorder will affect production in both languages. If you are concerned, a speech-language pathologist experienced with bilingual children can evaluate whether the patterns are accent-related or disordered.
What to Tell Your Pediatrician
- Describe when you first noticed accent vs speech disorder in bilingual toddlers and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if your child's speech is very difficult for familiar listeners to understand in both languages by age 2.5-3.
- Mention if your child seems frustrated by their inability to communicate in either language.
- Let your doctor know if you have noticed any related concerns, such as changes in feeding, sleep, or movement patterns.
- Bring a list of any questions or observations you want to discuss at the appointment.
What Should You Do?
When to take action
- Mixing words from two languages in a single sentence (code-switching)
- Pronouncing some sounds with influence from the other language (accent transfer)
- Having a slightly smaller vocabulary in each individual language compared to monolingual peers
- Having a combined vocabulary across both languages that matches monolingual norms
- Taking slightly longer to begin speaking in sentences but catching up by age 3-4
- Your child's speech is very difficult for familiar listeners to understand in both languages by age 2.5-3
- Your child seems frustrated by their inability to communicate in either language
- Your child is not combining words in either language by age 2
- You are unsure whether your child's speech patterns reflect accent or a true disorder
- Your child has lost words or language skills they previously had in either language
- Your child has stopped trying to communicate verbally and uses only gestures after age 18 months
- Your child is not babbling or using any words by 15 months in either language
What You Can Do at Home
- Keep track of when you notice accent vs speech disorder in bilingual toddlers — noting the time of day, duration, and any triggers can help your pediatrician.
- Remember that mixing words from two languages in a single sentence (code-switching) — this is generally within the range of normal.
- At 12-18 months, focus on observation rather than intervention unless your pediatrician advises otherwise.
- Talk, read, and sing to your baby frequently. Narrate daily activities to build language exposure.
- While monitoring at home, seek immediate care if your child has lost words or language skills they previously had in either language.
Related Conditions
Is Bilingualism Causing My Baby's Speech Delay?
Bilingualism does not cause speech delays. Bilingual children may take slightly longer to say their first words in each individual language, but when you count words in both languages together, they're right on track. If your bilingual child has fewer than 10 total words (in any language) by 18 months or fewer than 50 by age 2, that's a delay - and you should get a speech evaluation, not drop a language.
Delayed Language in Bilingual Child
Being raised with two or more languages does not cause speech or language delays. Bilingual children may have slightly fewer words in each individual language, but their total vocabulary across both languages is typically on par with monolingual peers. Language mixing (code-switching) is also completely normal and is actually a sign of sophisticated language processing. If you have concerns, ask for an evaluation - but make sure the evaluator considers both languages.
Speech Delay in My Child
Speech delay means a child is developing speech and language skills in the expected order but at a slower pace than typical. It's one of the most common developmental concerns - affecting about 10-15% of toddlers - and early intervention through speech therapy is remarkably effective, with many children catching up fully by school age.
My Child's Speech Is Hard to Understand (Articulation)
Speech clarity improves gradually: strangers typically understand about 50% of a 2-year-old's speech, 75% at age 3, and nearly 100% by age 4. If you can understand your child but others can't, that's often normal - you're an expert in your child's speech patterns. But if even you struggle to understand your child by age 2-2.5, or if strangers can't understand most of what your 3-year-old says, a speech evaluation is a good idea.
Related Resources
Milestone Checklists by Age
Track your baby's developmental milestones from birth to 5 years with age-specific checklists.
Month-by-Month Development
Detailed monthly development guides from birth through 24 months.
When to Call the Doctor
General guide on when to call the pediatrician, visit urgent care, or go to the ER.
Frequently asked questions
Is accent vs speech disorder in bilingual toddlers normal?
When should I call the doctor about accent vs speech disorder in bilingual toddlers?
When is accent vs speech disorder in bilingual toddlers normal?
What causes accent vs speech disorder in bilingual toddlers?
What should I mention to my pediatrician about accent vs speech disorder in bilingual toddlers?
Is accent vs speech disorder in bilingual toddlers normal at 12-18 months?
Is accent vs speech disorder in bilingual toddlers normal at 18-24 months?
Should I go to the ER for accent vs speech disorder in bilingual toddlers?
Does accent vs speech disorder in bilingual toddlers go away on its own?
References
Doctor Visit Checklist
Bring this checklist to your next pediatrician visit to discuss Accent vs Speech Disorder in Bilingual Toddlers.
Things to mention
- Describe when you first noticed accent vs speech disorder in bilingual toddlers and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if your child's speech is very difficult for familiar listeners to understand in both languages by age 2.5-3.
- Mention if your child seems frustrated by their inability to communicate in either language.
- Let your doctor know if you have noticed any related concerns, such as changes in feeding, sleep, or movement patterns.
- Bring a list of any questions or observations you want to discuss at the appointment.
Observations to share
- Your child's speech is very difficult for familiar listeners to understand in both languages by age 2.5-3
- Your child seems frustrated by their inability to communicate in either language
- Your child is not combining words in either language by age 2
Urgent signs to report immediately
- Your child has lost words or language skills they previously had in either language
- Your child has stopped trying to communicate verbally and uses only gestures after age 18 months
- Your child is not babbling or using any words by 15 months in either language
My notes
From ismybabyalright.com — free, evidence-based baby health guides
All content follows our editorial policy and is reviewed against published clinical guidelines.
2,705 evidence-based guides6 authoritative medical sources5 medical advisory board members
Related Resources
Bottom line
Most cases of accent vs speech disorder in bilingual toddlers are normal. Talk to your pediatrician if your child has lost words or language skills they previously had in either language.
Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.
Was this page helpful?
Related Speech Concerns
Is Bilingualism Causing My Baby's Speech Delay?
Bilingualism does not cause speech delays. Bilingual children may take slightly longer to say their first words in each individual language, but when you count words in both languages together, they're right on track. If your bilingual child has fewer than 10 total words (in any language) by 18 months or fewer than 50 by age 2, that's a delay - and you should get a speech evaluation, not drop a language.
Delayed Language in Bilingual Child
Being raised with two or more languages does not cause speech or language delays. Bilingual children may have slightly fewer words in each individual language, but their total vocabulary across both languages is typically on par with monolingual peers. Language mixing (code-switching) is also completely normal and is actually a sign of sophisticated language processing. If you have concerns, ask for an evaluation - but make sure the evaluator considers both languages.
Speech Delay in My Child
Speech delay means a child is developing speech and language skills in the expected order but at a slower pace than typical. It's one of the most common developmental concerns - affecting about 10-15% of toddlers - and early intervention through speech therapy is remarkably effective, with many children catching up fully by school age.
My Child's Speech Is Hard to Understand (Articulation)
Speech clarity improves gradually: strangers typically understand about 50% of a 2-year-old's speech, 75% at age 3, and nearly 100% by age 4. If you can understand your child but others can't, that's often normal - you're an expert in your child's speech patterns. But if even you struggle to understand your child by age 2-2.5, or if strangers can't understand most of what your 3-year-old says, a speech evaluation is a good idea.
Ear Fluid Affecting Baby's Speech Development
Chronic or recurrent middle ear fluid (otitis media with effusion) can temporarily reduce hearing by 15 to 40 decibels, which is like hearing through water. During critical periods of language learning, this muffled hearing can impact speech and language development. If your baby has frequent ear infections or persistent fluid, discuss the potential speech impact with your pediatrician.
Will Ear Tubes Help My Child's Speech?
Ear tubes (tympanostomy tubes) can restore normal hearing by draining persistent fluid from the middle ear. Many children show speech and language improvement within weeks to months after tube placement, particularly if hearing loss from fluid was contributing to their speech delay. However, ear tubes alone may not resolve all speech delays, and some children benefit from speech therapy alongside tube placement.