When we defect from one country to cleave to a new one as our home, then we merge into the new culture. We show loyalty to that new culture and language. Recognizing anything different is treason. Families can speak their mother language to educate their children in the home, but Congress has enough on its plate without this potential trouble maker bill. As far as Congress is concerned: True Americans speak English and are happy to do so.
Culture is an important aspect of society, it is in our best interest as well as in the best interest of our citizens to preserve and promote the melting pot. We are a diverse nation and should embrace it.