When bilingual children intermingle their languages, the comments one overhears can be quite negative. And yet, there are very good reasons for their behavior. In addition, there are ways of helping them restrict language intermingling to bilingual situations.
I love this quote from Robert Rubin, the U.S. Secretary of the Treasury under President Clinton, because it states so cleverly something I often feel. If you say “X,” I automatically think, “But what about Y?” and “Is X always X”?