A:Answer ASUS Answers responded that there is no Spanish keyboard. As a workaround to that, here are the steps type the letter "n" a tilde.
Open your document where the Spanish n With Tilde is to be typed.
The cursor should be positioned in the desired location.
Press and hold on one of your keyboard’s Alt Keys.
As you hold down the Alt key, use the numeric keypad on the right to type the N With Tilde Alt code (165 or 164).
Release the alt key after typing the code.