How I learned Cantonese:
I learned Cantonese speaking it with my mother, who is originally from HK, growing up in Germany with my dad not being a non-Cantonese speaker. I never had any formal education in Cantonese. My pronunciation is pretty good, but my vocabulary seems stuck at the level of a 6-year old due to lack of speaking with other Cantonese speakers on a regular basis (apart from holidays in HK visiting family). I also learned Mandarin as a teenager, but haven’t really used it in the last 20 years so it got VERY rusty. I can read some simplified and some traditional characters (kinda enough to know what I’m ordering in a restaurant) but I’m FAR from being proficient in any way. In short, I can have rather simple conversations about my last holiday, the weather, food etc. without people noticing that I’m not a native speaker (unless they see me as I look more European than Asian!) but I would struggle in any professional context or listening to more formal Cantonese.
Current situation with kids:
Now that I’m in my mid thirties and have two kids (3yo and 4 months old), my partner (who is also German) and I naturally speak German at home. We live in a French-speaking country so they’ll grow up speaking both languages. Apart from the odd Chinese word, I haven’t taught them (well, not the baby of course) any Cantonese. I think this is mainly due to laziness on my part since I need to make a conscious effort to speak it whereas German is just natural for us at home. Another reason is lack of confidence as I’m not a fully proficient speaker myself.
I’ll take the family to HK early next year - my first trip to HK in 7 years. It made me think about whether I should make more of an effort to pass on Cantonese to them - but I have doubts whether my Cantonese is good enough plus the natural convenience of speaking German amidst our busy lives with work and all the stress that young parents have! However, it feels like a wasted opportunity to help them speak another language which I think helps in so many ways (I have a an entirely unfounded hypothesis about more neural connections the more unrelated languages one speaks!) - and not least to preserve Cantonese.
Sorry for such a long post but I was keen to provide some context. I’d love to hear any thoughts and perhaps someone has been in a similar situation.