In my opinion you should learn Spanish language because Spanish is the third language which is most widely spoken language in the entire world. If you want to learn fluent Spanish then you can take help from webspanish.com. Spanish language is not very difficult to learn.
I prefer Spanish language.Because in the US, Spanish is the second most spoken language after English. If you speak Spanish,you travel abroad to meet your future business partners, managers or customers, you can get so much more out of the experience.There are so many website provide Spanish tutorial.