To obtain a commercial pilot license the International Civil Aviation Organisation states that the applicant must be able to understand English. This is a safety precaution when flying internationally as one language is needed to make sure anyone can understand anyone else whichever country or airspace the plane happens to be in.
One of the key features of the English language is the willingness to accept new words and phrases from other languages and of course to create new words itself. English is very relaxed when it comes to evolving which has allowed the language to be very flexible. This helps keeps it modern and relevant and helps spread its influence.
To obtain a commercial pilot license the International Civil Aviation Organisation states that the applicant must be able to understand English. This is a safety precaution when flying internationally as one language is needed to make sure anyone can understand anyone else whichever country or airspace the plane happens to be in. 
One of the key features of the English language is the willingness to accept new words and phrases from other languages and of course to create new words itself. English is very relaxed when it comes to evolving which has allowed the language to be very flexible. This helps keeps it modern and relevant and helps spread its influence.