Aviation has chosen to use one language for reasons of safety. It is no surprise that if everyone on the frequency can understand all of the conversations taking place then everyone will have a much clearer mental picture of what is occuring at any given time. To errode this for reasons of misplaced ideas of respect does no service to aviation. Everyone in aviation today knew well before getting involved that English would be the common international medium for communication. If you live and work in another country then by all means learn and speak their language, but do not bring it to the aviation arena.