Languages - guidances,ways to learn.

English is a must have thing on IT market, you can`t survive without it.
Learning Spanish or any other language - that depends on your wish, if you want to work with chinese and spanish people - I think it will be a nice option,but I think that employees of decent IT companies are already english-speakers.
We can dig deeper - moving to Spain or China because of job offering, and here you`ll need the language for sure.

So knowledge of any foreign language is a good option with which you can do some cool things, but the most cool is moving to the country where this language spoken.