Despite my husband and I both only speaking English at home, my daughter mainly speaks Japanese. This was because of daycare. She’s been out of daycare and at home with me for three months now and she’s using English more but not as much as Japanese. My husband has also switched to speaking Japanese with her since she no longer gets that from daycare.
English language television shows/movies for young children have definitely had a positive impact on her English skills. She repeats a lot of things she hears. I also read her lots of English books and she video chats with her relatives in Canada at least once a week.
At the same time, she’s only two, so we’ll see what happens. I’ve heard of parents with older children who speak both English and Japanese using English workbooks once their child starts school and only allowing English language media in the house.
I’d love to hear from parents of older kids!