i grew up with some people who spoke 2 languages pretty poorly (english and chinese).  they essentially had bad grammar and accents in <i>both</i> languages.  i know for a fact their parents made them speak chinese at home.  unfortunately, by the end of college (i.e. entering the real world where linguistic skills really count), they hadn&#x27;t improved much if at all.<p>it&#x27;s almost as if they had a &#x27;total lingistuic aptitude cap&#x27; and it was spread out among two languages.  i bet if they chose to stick to one language, they&#x27;d speak it better.