They use to call it Americanization
Roosevelt in 1894:
"One may fall very far short of treason and yet be an undesirable citizen in the community. The man who becomes Europeanized, who loses his power of doing good work on this side of the water, and who loses his love for his native land, is not a traitor; but he is a silly and undesirable citizen. He is as emphatically a noxious element in our body politic as is the man who comes here from abroad and remains a foreigner. Nothing will more quickly or more surely disqualify a man from doing good work in the world than the acquirement of that flaccid habit of mind which its possessors style cosmopolitanism."