I had the same impression, and agree with you.
When he was in the army and stationed in France, my maternal grandfather married a French woman in Aix-Les-Bains, Savoie, France around the same time as Treaty of Versailles, signed on June 28, 1919, and he brought her to the states. During WWI she was an interpreter for General Pershing, so she was already fluent in English. She became an American citizen (not sure what year). For many years she gave private lessons in French to finance her multiple trips home to France over the years.
My daughter-in-law is German. Besides German, she is fluent in English and Russian plus can speak some French. Three of my adult grandchildren are by-lingual. My is fluent in German and French in addition to his native English.
English is the most commonly spoken language worldwide with somewhere around 1.5 billion speakers. Why do you suppose one third of all immigrants to U.S. never learn English? Most countries have dual or multiple signage. Spanish is the most common second language signage in the U.S.