Spanish translation

[nguevara]

Hello, congratulations on the work everyone has made so far.
I'm looking forwards to translate the cheatsheets to Spanish.

I've been told to open an issue to gather those who want to help, so here it is.

[rougier]

Thanks,, that would be a great addition. If you can wait end of July, that would be best since a lot of PR are watiing to be merged. I'm not sure what is the best way to work for translation but you might need to direclty work on the latex files since depending on the length of sentences, you'll need to tweak a bit the layout (whihc is rather tight).