one more and more hears people who are likely decendants of asians speaking dialects of Spanish,

A very good point, Geoff - one of my most enduring memories of a hitch-hiking trip through Norway in the late '50s was standing outside a farmstead on the road between Bergen and Oslo, speaking to an old Norwegian farm-worker who spoke with a faultless *Irish accent! He told me that he'd never been to Ireland in his life, but had worked for twenty years in New York.