RELATED PAPER
Rasmus,
There is an excellent paper submitted to Embry-Riddle in 2007 which may give you a wider perspective and assist in your endeavours. the synopsis is:
Controller-to-controller communication plays a vital role in coordination of air traffic and maintaining a safe and efficient flow of airport operations. Aviation accident investigators have demonstrated how communication breakdown between pilots and air traffic controllers has lead to disastrous results. American military air traffic controllers assigned to air traffic control (ATC) facilities outside the U. S. work in close relations with host nation air traffic controllers in support of U.S. military aircraft operations. These facilities allow the U.S. personnel to control aircraft in a country where the spoken native language is sometimes one the U.S. controller might not understand. The International Civil Aviation Organization (ICAO) outlines the language requirements for pilots and air traffic controllers operating outside of the U.S. However, ICAO specifies the language or languages to be used are the nationally designated languages for air traffic control in that specific country. Communications and teamwork between controllers enable missions to be accomplished safely and efficiently. However, even in a multi-cultural environment, controllers must still interact face-to-face in a time critical
environment, leaving little room for miscommunication and misunderstanding.
PM me if you are interested and I'll put you in contact with the author.
MJG