Euskaldun
If you were a pilot, you wouldn't need to even ask that question. It's called spatial awareness.
Your proposals are absolutely impractical. How many years training in each langugae would you make a pilot have before being allowed to fly to another country?
As for Squawk7777, We're not in Latin America here. We're in Europe.
The argument for speaking one language has been made time and again. Your narrowmindedness and refusal to see any other point of view other than your own or labelling it as 'French-bashing' just shows up your ignorance.