Think about this, what if one day you decided to take a trip/vacation to Mexico, or France? How would you be able to understand them if you didn't know their language? First of all...
Or maybe you are a doctor who has a client who speaks a different language. Would you be able to talk to them? Or would you need a translator? You might even have to send the patient to another doctor who speaks their language.
But lets say that you do know a little bit of Spanish or another language, you would be able to...
Of course, learning a language is not as easy as it sounds. Some languages are extremely hard to learn, due to its diversity. So what can you do?
Once you reach a certain level, you will be able to speak that language fluently enough to the point that someone can who knows that language can understand you. At that point, if you choose to keep learning, then its mainly up to experience that will build you up.
Currently I am learning 2 other languages besides English, they are Chinese and Spanish. I take Chinese classes once a week on sundays, and Spanish classes every other day of school. I use Chinese a lot at home, and if I don't know how to say something, I ask my parents. As for Spanish, I have a great teacher. He always makes that class so fun and he really creates a friendly, exciting learning environment.
So now, will you decide to learn a different language? Do you think there are benefits that can come with it? It's not up to me to decide, but you!