Once again Jettlager,
yes there was a language speaker on board which went ill in Narita, so a paxing japanese speaking F/A was used. What would be the case if you had 2 or even 3 language speakers onboard and they all went sick from food poisoning or something, you would use your resources and use a passenger like a tour leader etc that could speak both English and Japanese. I am made aware by a long haul CSM that she has been on numerous Japan trips with long haul crew and no language speaker, so..........
Also the evacuation was not given by a PA, it was initiated by the evacuation signal alarm which prompt crew to start the evacuation commands/process, including the paxing language speaker yelling the commands in Japanese in the cabin, because as every paxing crew member is required to assist in such a situation.
There are still about 6 QF long haul Japanese crew still based in Japan, it is all very quiet though, don't hear much about it.
Again i say, don't try and post facts when you don't know. I was on the damn flight, message me and i will tell you directly! There is no finding fault in the crew, absolutely i agree we need atleast 2 language speakers onboard and this has been expressed to management.
Oz