Translation of Coala Documentation into spanish language

Greetings Coala Team!

I would like to help translating the documentation of Coala available at http://docs.coala.io/en/latest/ into spanish language. In order to do so, I have a couple of questions.

Should I make a new branch called Spanish and do the translation from there? or how would it be more convenient to have this translation?

Thanks in advance for your answer.