I am lucky to be sharing an office with a guy from Valencia who has translated the Justcoin website. He does not know much about Bitcoin or Ripple, so I ask you to look over his work:

The translation is live at justcoin.com. If the page is in English, click the flag at the bottom of the page.

Language files
English language file: https://github.com/justcoin/snow/blob/master/web/i18n/en-US.json
Spanish language file: https://github.com/justcoin/snow/blob/master/web/i18n/es-ES.json

If you register on Github, you can make corrections by clicking Edit while viewing the files above.

Thank you