This page is like the main demo page, but the functionality is not activated unless you have installed the toggle-spanish-accents.user.js GreaseMonkey script.
For example, to type 1º frase: ¡Hola! ¿Como estás?, type the following:
1 o [F2] [F2] [space] f r a s e : [space] ! [F2] H o l a ! [space] ? [F2] C o m o [space] e s t a [F2] s ?
Try it by typing some Spanish here: