The original question was whether or not language was important for pleasure. I speak Spanish and Portuguese but I don't think language is critical specifically for pleasure. If your mouth is full of fat uncut cock, it you are enjoying a youthful round muscled ass, or doing everything you can not to scream for mommy while your hole is being opened up like a Chinese fortune cookie, you don't need any words that body language, or in a pinch, bing or Google translate can't give you.
But some of us crave something more than just the sex. We want a connection, friendship, or romance and frankly this is a lot more difficult to achieve without language or through a translator app; not impossible, but quite challenging.
I will also add, if you are careless, as I've been twice, speaking Portuguese won't magically protect you from being robbed or taken advantage of by opportunistic garotos who figure out how to take advantage of you not speaking a lick of English.
My two cents anyway.