You can add diacritical marks (é, á, ó, ñ…) or special punctuation (¿, ¡) using your iPad or iPhone (English) virtual keyboard.
1. Tap and hold the standard version of the letter or punctuation mark you wish to use. (Note: for the inverted question mark or exclamation point, select the regular version).
2. A pop-up bubble appears with available options.
3. To insert, slide to and select the desired character.