What do you mean? You just type away. Spanish uses similar typefaces than English. Some vowels have accents. You can google shortcuts to type them in. Or you can copy/paste from the original document. If your question is about something else please tell.
The last page of this doc
contains a condensed list of special characters which are accessible
on Windows computers with standard keyboard (opposed to laptops)
by ALT + dial a 4-digit-number.
Besides the accents, one needs in Spanish ñ, Ñ, ¡, ¿, «, », –, —, ü, ...
Alternatively one may use the Windows program CharMap.exe.
Best regards --Gernot Hoffmann