The spanish version has next wrong details:

1) the click on "Todos los artículos" in column Knowledge base leads to the page with header "All artículos". I think it should be header "Todos los artículos" on the page.

2) in the contact form window when the user clicks on the most popular question there is opening window with english link on the top - "open new window". I am pretty sure it should be nice to translate it in spanish.