There are thousands of languages in the world, and chances are, you or someone you know speaks one other than English. If you want to have your Mac use that language, making the switch is easy enough to do.
You don’t have to go as far as changing everything within your Mac to display in a different language. If you’d still like your Mac to predominantly display in English with certain apps being in an alternative language, that’s possible as well.
Both are very simple settings to modify and take a matter of minutes to set up.