Accent vs Speech Disorder in Bilingual Toddlers
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.
By Age
What to expect by age
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.
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.
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 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
Sources
Related Resources
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.
My Baby Is Losing Words or Skills
If your child was consistently using words and has truly stopped, this is something to act on promptly. Regression - the genuine loss of skills a child previously had - is different from a normal plateau or a toddler being too busy to talk, and it always warrants a conversation with your pediatrician sooner rather than later.
Baby Not Babbling
Babbling with consonant sounds like "ba," "da," and "ma" typically begins between 6 and 9 months and is an important building block for speech. Babies develop at different rates, but if your baby is not making any consonant sounds by 9 months, a hearing check is a good first step.