ahhh you see my grandad worked on the communication systems for concorde so i feel i can answer this with some authority:
a high-tech communication system was developed based on something refered to as GTS (girly-teen-speek) well known to be the fasted form of communication on earth. all passengers were asked to wear headsets to communicate with each other and normal conversation was passed through a filter before being played into the recipients headset. for example:
original statement:
“what are your opinions on the current socio-economic situation in developing russia old chap?”
translated and sped up into GTS:
“like totally like whats your like viewz on like stuff like innit?”
as you can see the word count is dramatically reduced too which is a bonus.
HTH