A pal of mine once flew on an AF flight Strasbourg-Paris and was surprised to discover that the aircraft and crew were from Monarch, and all cabin announcements were in English only.
I'll bet that Chauvin's compatriots who were on board absolutely loved that.
T'was a while ago ...
When did this practice become widespread? Who was the first to adopt it and why? Was it in response to a particular circumstance? It seems not to be an international regulation - did one country legislate for it and others followed. Or did one airline introduce it and others followed, for reasons not entirely associated with safety - to impress the customers, maybe or increase the perceived importance of the CC task?