Kids do not “lose” a heritage language overnight. If they understand it, you can grow it again by making it feel normal, useful, and joyful at home.
Q:
Has anyone successfully strengthened a heritage language after English became their child's dominant language?
For context: I'm Vietnamese, my husband is Brazilian, and we live in the US with our 4-year-old. At home, we mostly speak English. He understands English very well, and about 90% of his vocabulary is in English. I try to speak Vietnamese with him most of the time, but I often end up mixing in English, especially when we read, since most of our books are in English (he loves books!). My husband rarely speaks Portuguese with him because he has lived in the US for a long time and feels more comfortable speaking English.
Recently, I've been trying to speak only Vietnamese with him when it's just the two of us, and switch to English when my husband is around. However, I'm worried this might not provide enough exposure. My husband isn't very enthusiastic about the OPOL (one-parent-one-language) approach because he feels left out when I speak Vietnamese with our son while he's present. On top of that, he attends daycare for half the day during the week, where everything is also in English.
Since English is clearly his dominant language now, I'm wondering if it's still possible to meaningfully build up his Vietnamese alongside it. Has anyone had success strengthening a heritage language after English became the stronger language? Sometimes it's challenging because he knows I speak English too, so he tends to resist when I encourage him to use Vietnamese.
I would really appreciate hearing about others' experiences and any strategies that worked for you. Thank you!
A:
Yes, it's definitely still possible to strengthen Vietnamese even if English is currently your son's dominant language. At 4 years old, children's language dominance can still shift quite easily depending on exposure and motivation. Many multilingual kids go through phases where the community language (English) becomes stronger because of daycare or school, but the heritage language can still grow with consistent, warm input.
One encouraging sign is that you're already speaking Vietnamese with him. Even if he often responds in English, he is still receiving valuable exposure. In bilingual development, understanding usually grows before speaking, so comprehension is a strong foundation.
Create consistent Vietnamese moments
If OPOL does not work well for your family, choose routines that are always in Vietnamese. Bedtime, breakfast, bath time, or one-on-one time with you: predictable language routines can make a big difference.
Use activities he already loves (books still count)
Since he loves books, you can add Vietnamese books when you can, and also use English books as a bridge. Retell the story in Vietnamese, talk about the pictures in Vietnamese, and keep a few repeating phrases that show up in every book.
Allow English responses for now
It is very common for children to answer in the dominant language even when they understand the other one. You can keep speaking Vietnamese without pressuring him to reply in Vietnamese. Over time, many kids begin using the heritage language once they feel confident and it feels “worth it.”
Create social reasons to use Vietnamese
Kids are more motivated to speak a language when it connects them with people. Video calls with relatives, time with Vietnamese-speaking friends, or community events can make the language feel meaningful, not just something to practice.
A note about your husband and Portuguese
Your husband feeling left out is real. Instead of a strict rule, consider a shared routine that includes Portuguese (a song, a weekend walk, a short bedtime story). The goal is to make both heritage languages feel like “family languages” and keep the emotional temperature warm.
Most importantly, it is not too late at all. Many children strengthen their heritage language even later in childhood once they have more exposure and stronger connections to family and culture. Your consistent effort now can have a big impact over time.