Julie Tetel Andresen in The Allusionist:
Monolingualism is an aberration – most people have been multilingual…
The human body and brain is quite well adapted to multilingualism. So the ideology of monolingualism is a fairly new phenomenon, only the last couple of hundred years. It’s such a distortion…
Think of the language situation before the mid-18th century. There were empires, multilingual conglomerations, whose borders waxed and waned with marriage and war; nobody cared about linguistic diversity, the great threat to unity was religious diversity. When the state decided to mobilise language as a resource for creating the nation, you got the ideology of the monolingual nation state, where we want linguistic borders to coincide with national borders. But of course they never did.