I wish to recommend on 'What I Do'. This is an excellent application. Allows you to promote your services and products to your Facebook network. Display your skills/wares on your profile box and list yourself in a business directory. Recommend your colleagues services and products too.
Assuming it is not one of your friends posting in Spanish, sign in and go to "settings" Then "General" From there you can choose "Language" and pick the language you would like from the drop-down list.