Latin Letters and Accents:
Using the Latin alphabet (A, B, C, D...) and the character "ñ" as well as some accents ("é"), and you will have all that is needed to write in Spanish.
* It may be noted that though not a standard, accents are typically omitted in capital letters.
Inverted Characters:
Spanish question marks and Spanish exclamation marks are used in the same manner as traditional question/exclamation marks in English, except that the characters are written upside down. To finish off any interrogative or exclamatory clauses you can use the inverted Spanish question mark ("¿") or inverted Spanish exclamation mark ("¡") in place of "?" and "!" respectively.