Now I beg to defer here. "i also see them speaking in english with the child which just leads to loosing the originality of the child .... he/she doesnt have any cutural base"
My family consists of a multitude of races and nationalities, even my parents are of different nationalities, and throughout my childhood the only language we ever spoke in was English cos that was the one language we all had in common.
Today my husband and I speak primarily in English for this reason as he to comes from such an extended family. My daughter speaks fluently in English and knows now quite a bit of Arabic since she attends an Arab majority school.
I guess it depends from person to person, and though I can speak/understand English,Hindi,Sinhalese, and Nawaithi, well with a little bit of Arabic, I'm happy with my daughter knowing just Arabic and English only.