Do you need to speak Spanish to live and work in Barcelona, Spain?

Question

Is the knowledge of Spanish required to live and work in Barcelona, Spain? I speak fluent English and fluent French.

Answer 1

No, it's probably better if you can't communicate there.

Are you serious?

Answer 2

Of course, it is absolutely necessary... do you think it is necessary to speak french if you go work in France??

Answer 3

I´m British and I live in Spain and I believe as you are a guest living in someone elses country then you should learn the language. I´m learning Spanish because I want to integrate.