Should we use our family language only at home or should we also use the societal language?

Evidence-based answer · Last updated 30 Aug 2026 · How it’s made

The short answer

The research strongly suggests you don't have to choose one or the other: children reliably pick up the societal (majority) language from school, peers, and the surrounding environment even with little support at home, but the family/heritage language usually only survives if it gets rich, consistent use at home. So the safest strategy is to keep the home as a strong base for the family language while trusting the outside world to supply the societal language.

Answered for language learning in general. No specific language was set for this question, so the findings are drawn from general second-language research rather than one language’s literature.

Kids get the societal language regardless

Multiple studies found children from immigrant/minority-language homes end up speaking the majority (societal) language well regardless of how much support parents give it, because school and the surrounding community provide it anyway.^3,7

Heritage language needs deliberate home support

Unlike the societal language, the family's heritage language depends heavily on how much it's actually used at home; without that input it tends to weaken or disappear across generations, especially by the third generation.^3,12,15

In plain terms

Heritage language means the language spoken by the family that isn't the main language of the surrounding society.

Heritage-only or two-parent heritage use works best

Comparing different family strategies, using the heritage language exclusively at home, or having both parents speak it, produced better heritage-language outcomes than mixing languages loosely or relying on only one caregiver.^1,7

One-parent-one-language isn't magic

The popular advice that one parent should always speak the heritage language and the other the societal language (OPOL) is not shown to be necessary or sufficient on its own — several studies found it didn't reliably outperform other approaches, and in one small study of German-French children it actually left the minority language behind.^1,7,8

Overall amount and quality of home exposure matters most

What predicts heritage-language success across studies is less the specific 'rule' families adopt and more the total amount, richness, and consistency of exposure — things like frequent talk, shared reading, and enrichment activities in that language.^3,5,6,10

Using the societal language at home doesn't have to hurt the heritage language

Bringing the societal language into the home (through translanguaging, mixed use, or school support) doesn't automatically damage the heritage language, and heritage-language exposure doesn't hold back the societal language either — in one study Vietnamese exposure did not hinder children's English development.^3,11,14

In plain terms

Translanguaging means fluidly mixing or switching between languages in the same conversation rather than keeping them strictly separate.

Strict separation can still fail without commitment

Keeping languages strictly separate (heritage at home, societal at school) is a common approach, but its success depends on sustained parental commitment and favorable social conditions; one detailed case study of a transnational family found that failing to set firm boundaries between home and societal languages led to the child ending up dominant in the societal language despite heritage aims.^2,13

Heritage language classes and extended family help

Formal heritage-language schooling and involvement of grandparents or a wider heritage-speaking community are linked to stronger heritage-language literacy and maintenance, on top of whatever happens at home.^9,10,14

Parental attitudes shape outcomes as much as rules

Parents' beliefs about bilingualism and their attitudes toward mixing languages predict heritage-language success at least as much as which specific home-language policy they officially adopt.^4,5,14

What to do with this

Across these studies, the consistent, low-risk approach is: make the home a strong, consistent space for the family/heritage language (through talk, reading, and enrichment activities), because the societal language will be acquired anyway through school, community, and peers, often even without deliberate parental effort.
Don't feel bound to a strict rule like 'one parent must always speak the heritage language' — what matters more is the overall amount and richness of heritage-language exposure and everyone's shared commitment to it, not the exact formula used.
If possible, supplement home use with heritage-language classes, reading with grandparents, or a heritage-speaking community, since these add measurable benefits beyond home talk alone.
If some societal language creeps into home life (mixing, translanguaging), the evidence suggests this doesn't have to torpedo heritage-language development, as long as substantial, high-quality heritage-language input continues.
Where it's genuinely a struggle to keep the heritage language alive under school pressure, decide deliberately and early, rather than drifting, since ambiguous or inconsistent boundaries were linked to the heritage language eventually losing out.

Now pick something to do it with

Our resource list is an overview of the apps, courses and immersion material worth a look, whatever you're working on.

See our resources

Worth knowing

Almost all of this evidence comes from immigrant and heritage-language families rather than families deliberately teaching a foreign language for enrichment, so the findings are about maintaining a language a family already speaks, not about starting one from scratch.
Most studies are correlational surveys or small qualitative samples, often in specific countries (Australia, Canada, Netherlands, UK, Sweden, Greece, Israel, US), so results may not generalize evenly to every language pair or migration context.
'Success' in several studies is based on parents' own perception or self-report rather than independent language testing, which could bias the results toward what parents want to believe.
Findings on strategies like OPOL are somewhat mixed between sources, so treat any single 'best method' claim as context-dependent rather than universal.

Want a deeper literature dive?

There’s enough published research here to go wider than the usual pass. Available on the Pro plan.

See plans

[1]Gloria Pino Escobar, Chloé Diskin-Holdaway, Paola Escudero. How Effective Are the Different Family Policies for Heritage Language Maintenance and Transmission in Australia?. Languages 2025. doi.org/10.3390/languages10120290
[2]Sarah Surrain. ‘Spanish at home, English at school’: how perceptions of bilingualism shape family language policies among Spanish-speaking parents of preschoolers. International Journal of Bilingual Education and Bilingualism 2018. doi.org/10.1080/13670050.2018.1546666
[3]Giang Pham, Timothy Tipton. Internal and External Factors That Support Children's Minority First Language and English. Language Speech and Hearing Services in Schools 2018. doi.org/10.1044/2018_lshss-17-0086
[4]E. Daskalaki, Adriana Soto-Corominas, Vera Yunxiao Xia, J. Paradis. The role of parental characteristics, home language use, and schooling in children's Mandarin heritage language development in Canada. Frontiers in Language Sciences 2024. doi.org/10.3389/flang.2024.1435200
[5]Emily Mak, Natasha Nichiporuk Vanni, Xintong Yang, María Lara, Qing Zhou, Yuuko Uchikoshi. Parental perceptions of bilingualism and home language vocabulary: Young bilingual children from low-income immigrant Mexican American and Chinese American families. Frontiers in Psychology 2023. doi.org/10.3389/fpsyg.2023.1059298
[6]Josje Verhagen, Folkert Kuiken, Sible Andringa. Family language patterns in bilingual families and relationships with children’s language outcomes. Applied Psycholinguistics 2022. doi.org/10.1017/s0142716422000297
[7]ANNICK DE HOUWER. Parental language input patterns and children's bilingual use. Applied Psycholinguistics 2007. doi.org/10.1017/s0142716407070221
[8]Andrea AN MacLeod, Leah Fabiano-Smith, Sarah Boegner-Pagé, Salomé Fontolliet. Simultaneous bilingual language acquisition: The role of parental input on receptive vocabulary development. Child Language Teaching and Therapy 2012. doi.org/10.1177/0265659012466862
[9]Khadij Gharibi, Seyed Hadi Mirvahedi. ‘You are Iranian even if you were born on the moon’: family language policies of the Iranian diaspora in the UK. Journal of Multilingual and Multicultural Development 2021. doi.org/10.1080/01434632.2021.1935974
[10]Marina Mattheoudakis, Aspasia Chatzidaki, Christina Maligkoudi. Heritage language classes and bilingual competence: the case of Albanian immigrant children in Greece. International Journal of Bilingual Education and Bilingualism 2017. doi.org/10.1080/13670050.2017.1384447
[11]S. Karpava, Natalia Ringblom, Anastassia Zabrodskaja. Translanguaging as a Dynamic Strategy for Heritage Language Transmission. Languages 2025. doi.org/10.3390/languages10020019
[12]Mina Kheirkhah. From family language practices to family language policies : Children as socializing agents. Linköping studies in arts and science 2016. doi.org/10.3384/diss.diva-126178
[13]Seyed Hadi Mirvahedi, Mona Hosseini. Family language policy in retrospect: Narratives of success and failure in an Indian–Iranian transnational family. Language Policy 2023. doi.org/10.1007/s10993-023-09649-4
[14]Orsolya Bilgory-Fazakas, Sharon Armon-Lotem. Resilient heritage language maintenance: the interplay of family, culture, and pragmatic choices. Frontiers in Psychology 2025. doi.org/10.3389/fpsyg.2025.1550704
[15]Xiao Lan Curdt‐Christiansen, Francesca La Morgia. Managing heritage language development: Opportunities and challenges for Chinese, Italian and Pakistani Urdu-speaking families in the UK. Multilingua 2018. doi.org/10.1515/multi-2017-0019

Related questions

Does the one-parent-one-language (OPOL) approach actually work?

The evidence is mixed. Some large surveys found OPOL families reported strong heritage-language maintenance, comparable to families where both parents use the heritage language, but other studies found OPOL was not sufficient by itself — in one small study of German-French bilingual children, the minority language still fell behind under OPOL, and a large questionnaire study of nearly 1,900 families found OPOL was neither strictly necessary nor guaranteed for success. The common thread is that what mattered most was the total amount of heritage-language input the child received, not the specific parent-language pairing rule.

Will using the family language at home hold back my child's development in the societal language?

The sources suggest no. In a study of Vietnamese-speaking families in the US, children's English vocabulary depended mainly on their age and general cognitive factors, not on how much Vietnamese was used at home, and the researchers concluded that heritage-language exposure did not hinder English development. Children in immigrant families were described as picking up the societal language 'with or without familial support' because school and community supply ample exposure.

Do heritage-language classes or schools make a real difference on top of what happens at home?

Yes, based on the sources examined. A study comparing Albanian immigrant families in Greece found that children attending systematic heritage-language classes had stronger heritage-language literacy skills than those who didn't, even though parents in both groups tried to support the language at home. Similarly, involvement of grandparents and heritage-speaking communities was linked to stronger maintenance in other studies, suggesting that formal instruction and extended family exposure add benefits beyond home language choices alone.

What if we mix both languages at home instead of keeping them strictly separate?

The findings suggest mixed-language use can still lead to good heritage-language outcomes, but only when the overall amount of heritage-language use stays high; one nationwide survey found mixed-language families with high heritage-language use reported success comparable to heritage-only or OPOL families, while mixed-language families with lower heritage-language use did not do as well. A study of translanguaging (fluidly blending languages) in Cyprus, Estonia, and Sweden similarly found it could support bilingual development, though families noted it works best when practiced deliberately rather than left unplanned, since local school dominance of the societal language remains a persistent challenge.