Using accents in Spanish is important to convey the proper meaning and tense of words. But American keyboards don’t make adding accents obvious. The ene is a great example. You can hold down any key with a letter that has accents in any language. That will pop up a menu to show you available accents for that letter. Then click with your mouse or type the number of the correct accent.
This works on Macs and iPhones / iPads.
