Earlier quoted context omitted.
That's not universally true. In my country, German was the widely accepted and taught second language until WW2. Since then it's been English.
It would help if we knew which country. Was this due to (1) pre-WW2 German language mostly useful for trade with Germany, or (2) a significant minority of ethnic Germans, who probably returned to Germany (E/W) after WW2? My guess: #2.
No significant minority of ethnic Germans, and I think trade with Germany and the UK was roughly comparable.