A friend of mine had his check-out exam. For some unexplainable reason some Polish pilots (expecially those from Lot Polish Airlines) believe that it's up to them to choose the com languange and there was one of those guys on the frequency. He started with Polish (which according to AIP Poland is perfectly OK until now) but since there was some other traffic my friend replied in English.
The answer was" "I started Polish so you should use Polish also" so my friend explained in English that there was other traffic etc. The pilot, also known as cpt. G****** replied: "If you don't talk to me Polish I'll file a report on you".
The ATCO's answer actually killed everyone: "OK, so I'll talk to you English and then I'll be saying that again in Polish so that everyone understands"
