This is a tough choice because where I live is truly a melting pot. There are all kinds of races with all kinds of languages. I am already fairly proficient in Spanish, which is very useful in my city. It was so easy to learn Spanish because there many Spanish speakers in my city, many classes, and the textbooks are highly developed. I think the next language will be Arabic. There are a lot of people that speak it here, and it is taught at the local schools. Or maybe Mandarin. There is not as much opportunity to use it in my city, but I do some business with vendors in China, so it should still be very useful to me. Unfortunately not as many schools in my city teach it, maybe none of them do.