I haven't flown commercially, since I flew home from my European duty in 1965, and don't plan on flying any time soon. ..Not that I have any fear of flying, but I just hate the big crowds and the junk that has been tossed into the game since 9/11.
That being said, I believe the FAA runs the airports and employees primarily for the purposes of uniformity. Uniformity as to how to handle weather conditions, landing and takeoff rules and sundry other details, much like, but perhaps even more important than, highway rules.
After all, if your plane quits, you can't just pull it over and park it until AAA arrives !
Uniformity as to rules and regs was long ago recognized, particularly for international airports ! For instance, it was long ago, that the FAA and other national bodies recognized the need for a single accepted, universal language, to save confusion. Therefore, English was chosen as the language of the airlines.
Not all airports are treated the same, or regulated the same. One wouldn't expect a small, local airport in Chile or Bhutan, to necessarily stick to the English only
proscription.
So, airports are regulated by their class...
https://www.faa.gov/airports/airport_safety/part139_cert/classes-of-airportsch is why English was chosen
