Please see: http://www.clinica-americas.com/english/index.html
in mobile. The language button on the top right works.
Then go to: http://www.clinica-americas.com/english/about.html
in mobile, the button doesn't work.
When I look at it in Firebug. on the first page I can select the button. On the second page, if I try to select the button, I select the whole div. So there's a problem there somewhere, hopefully we can find it!!