Some years ago in Toulouse, I saw a French instuctor teaching an Air China crew in the Sim. The crew had to work through an interpreter, so one can only guess how they got on with the ECAM! Later, over coffee, I asked the somewhat exasperated instuctor how he coped with a crew that could not speak English. His succinct reply:
"Mon vieux, it would be simpler to teach the interpreter to fly!"
Neppy
Deep & Silent