LNAV-VNAV,
I believe the job description for cy was to have good command of greek language its a fair request from the national airline remember it is a government owned operation not a private operation thats the perspective im coming from... My Point is to be a pilot involved in international operations the ICAO mandated language is English and this is essential....
If you want to go ahead and learn flemish be my guest..... As long as you can speak english you should be able to get by.....
I don't speak cantonese and i get by just fine!!!!
Happy Landings!! And Enjoy your flemish lessons

.... Don't drink too many of those flemish beers
Pete77