Spanish since your are based in LAX you have to have the right to work in the US. The Korean gig is not based in the US, everyone is based in ICN.
Just because Air China is a foreign company you are still based in the US hence the right to work status. Toyota, Nissan and BMW all have bases in the US but the workers at those plants all have the right to work in the US.
I don't know how long the above posters have been at EK but I made $13,300 working 17 days a month which is around $780 a day. Piss poor for a Widebody pilot especially when working 92 hours a month. I didn't mention the housing allowance which is a plus or the education allowance which is a minus. The education costs me about the price of a house in the US so we will call it a wash.
The Emirates package needs to increase significantly to be competitive with other Widebody jobs and they have to lower the hours per month.