You will always find English-speaking people in the tourist sphere (hotels, restaurants and airport) . Other Brazilians do not speak very well English, English or even, to be more precise, they do not speak at all in the bulk . But young people and educated people, of course, now speak English. . It depends on what and with whom you are going to talk . For negotiations, of course, it is better to use an interpreter . For everyday communication - ideal, in my opinion, will not learn how many phrases in Portuguese, as well as the score from 1 to 10 or slightly more than .