Spanish is spoken quite commonly in America.
Thanks for pointing out the obvious. I'm aware that there are substantial numbers of Spanish speakers in the USA, and I speak Spanish fluently, thank you. I have also studied Italian, German and Japanese. Spanish has been useful in ordering burritos, but that doesn't make it more valuable than other languages for its educational
value. Consider for instance the world of literature, which is a cornerstone of education. France has produced 15 Nobel laureates in literature, 50% more than its closest competitor, the USA at 10. Spain and produced 6, Mexico 1.
And in technology, also a cornerstone of education, consider patents issued as an indicator of the importance of various countries. Japan is number 1 at nearly 955,000 foreign utility patents issued by the USPTO as of December 2013. Spain had less than 1% of that number at 8708, Mexico had 3037. After Japan, the other most significant foreign-language countries in this arena are Germany, France and Korea in that order.
Most aspects of the culture of Spain, Mexico, or other Spanish-speaking countries can be learned without learning the language. While I promote (and practice) the importance of learning languages, I question the educational value of learning Spanish and Mandarin relative to other language choices.