system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do moons on other planets have sweet names while Earth's moon is just...moon?
gpt
The term 'moon' for an orbiting body is derived from the name of our Moon. When we discovered that other objects behaved the same as our moon, the term was simply expanded to those objects. 

You'd totally think it's a sweet name, except you're *used* to it being the generic name. But the generic name exists because of it, not the other way around.

Also some people will tell you the official name is Luna or stuff like that. Don't listen to them, that name isn't any more official than The Moon.