Spanish accents are composed of various symbols and letters that are used to modify the pronunciation of words. Tildes, which are also known as diacritical marks, are one of the most common Spanish accents. They are used to indicate a change in the sound of a letter, such as an accent or a nasalization. Tildes are written over the letter they are modifying, and can be found on vowels, consonants, and even some punctuation marks. They are an important part of the Spanish language, and are used to differentiate between words that would otherwise be pronounced the same.