How to add a Spanish layout to your MS Windows 98 keyboard
(So you can switch easily between English and Spanish)
Follow the instructions on the left and click on the hyperlinks as you proceed to see helpful visuals here
You have two choices to switch keyboard layouts using two-key combinations. This means that you must press the two keys together to make this work. Doing this will switch your keyboard layout back and forth between Spanish and your default layout (e.g., English).
Now, in reality you don't have to press them both at exactly the same time. You can press one, say the LEFT ALT key, and while keeping your finger on that key then press the SHIFT key.
There are two ALT keys in your keyboard, usually on either side of the SPACE BAR. To make this work you must use the one to the left of the SPACE BAR in combination with the SHIFT key.
It doesn't matter which keys you use for this combination (i.e., right or left side of the keyboard), so this might work better for you if you are left handed.