lifestyle2045 wrote:Do you start as early as it is born, for example the mother always talking one the father the other language to the child.
Very easy -- each parent always talks in their native language.
What if the parents talk to each other?
Then speak the way you speak now.
Or do you start later when the child starts to talk?
No, they'll understand your words before they talk themselves.
Can you handle it loose or do you have to be very strict about it?
Are there any books or webpages on that matter?
It's not complicated at all. If each parent speaks one language, the child will learn both. That's it, and that's pretty much all any of the many books on the topic will tell you to do.
Things get a little more complicated once your child goes to school, where they'll have to pick a "primary" language, but just ensure that they keep up in the other one as well (reading and writing as well). Or, for bonus points, enroll a child in a school where they use a
third language for teaching, and they'll easily pick up that one too!