This is a spin-off from another thread, where some people mentioned friends/family whose parents spoke different foreign languages and who hadn't learned either one and felt disappointed about it now. DH and I speak different foreign languages, and there's basically no hope of one of us learning the other one well because they are completely different (Asian versus Western).

If you and your partner speak different languages from the main language in the country you're living in now, do your LO(s) speak (or understand) either or both languages? If so, how did you teach them - i.e. talking to them in that language, through their nanny/grandma-care or school, through foreign immersion?

My understanding of the scientific evidence, though I haven't really looked into it in depth, is that it's best for a given person to always speak around the child in the same language. This obviously doesn't work so well if your partner can't understand that language. This makes me think nanny/nanny-share may be a more effective (but expensive!) way to transmit foreign language skills.