Interesting articles also.  Looks like Europeans as a group are becoming more multilingual, particularly in certain second languages.  I would guess the same trend may occurring in the US with large scale immigration from various places, but I doubt much of that trend can be attributed to families that do not include at least one immigrant member.  Americans as a whole, I believe, still tend to be rather insular in their thinking.  

I can swear there ain't no heaven but I pray there ain't no hell. _ Blood Sweat & Tears