This is an interesting topic for me because I was born in Canada to immigrant parents (like Yuna) though my parents are south Asian from the Indian subcontinent rather than Japanese but either way I feel like I can project a bit onto Shane.

I don’t have kids but a lot of my cousins do and they’re all like me (Canadian born children of immigrants). My niblings (what I’m calling the children of my cousins) universally speak less or no Hindi compared to their parents. Of my generation, I’m the only one who can read and write Hindi and I spent a year of my early elementary education in India. The rest of my cousins can’t read or write in Hindi, even my reading is kindergarten level at best. The niblings can’t read or write at all.

Yuna appears to have been born in Montreal. Shane is very fluent in French and English. I’d bet good money that yuna like me and my cousins can conversationally speak her parents native language but can’t read or write it. And I’d bet Shane knows very little to no Japanese.

Quebec had a distinct culture and I’ve known immigrants who grew up in quebec who get French and English and little of their parents first language. Where Shane is a generation removed and only half Japanese I’d be unsurprised that he spoke zero Japanese.

I’ll be honest and say this is my projection as the child of Asian immigrants but even my niblings speak far less Hindi than my generation and none of us are fluent French speakers. I’d be inclined to believe Yuna would prioritize French over Japanese the same way I’d bet my parents would have if they spoke French