Hey and welcome
Sorry, I'm really not sure concerning the translation project. And I don't speak Spanish so this might be hard for me, haha. You can open a thread and ask for spanish speaking people who might want to help you with that.
If you want to change your profile picture just go to the section "control panel". On the left side you will see the "my settings"-bar. There you can edit all sorts of things. Just upload an image which has got the right size.

Enjoy your time and sweet dreams
- Benni