For my tuppence, I have just got home in time for the footie and routed through France. Whilst every controller spoke excellent English, the local traffic, and subsequent RT, was a mystery to me so my SA was zero! If it was the case that the internationally recognised language of the air was French, by virtue of my chosen profession, I would have to learn French, however; it has been agreed as English. To that end, be professional and speak English. Complain all you wish but if your argument is that you are in my country and should at least speak my language, imagine how many languages I need to learn when I route around the place! That is why there is a chosen and common language of the air. Grow up and be a professional for goodness sakes...