Nowadays, a bilingual child the great edge among others. If you're a parent, how would raise a child to be a bilingual?
I don't have a kid, but I think bilingual kids are cool...:D
That is easy one year old my son speaks Spanish and English. My husband and his family speaks to him in Spanish and I and my family speak to him in English. My son does not have any problems speaking both languages.
I think it depends on how fast a child can pick up different languages since each child is different. Pressuring kids to learn more than 1 language can be stressful and affect development in other areas of learning.
If I had a husband with a different language than mine, I'd make each of us speak to the child in one's own tongue: the principle of one language one person.