With
CO, English is the only language that is required. However, it is a huge advantage to know another language. With that advantage, we do staff some of our international destinations with crew who speak that langauge. We have speakers of German, French, Spanish, Greek, Hebrew, Italian, Portuguese, Cantonese, Mandarin, Japanese,
To answer your questions:
1. 2
2. - domestic 0 (but I am talking about US domestic)
- international - one for each class of service
This is from a crew members point of view. Passengers would, no doubtedly, want as many speakers of their language as possible.
3. cabin crew here (I speak 4 languages and can get by in 3 others)
Reminds me of an old joke:
What do you call a person who speaks more than two languages? Multilingual.
What do you call a person who speaks two languages? Bilingual.
What do you call a person who speaks one language? An American.