In Hebrew, they often refrer to “Kadur ha-Ha’aretz” to distinguish it from the word “aretz” which can also refer to Eretz Yisrael, or land in general. Until a few hundred years ago, there really wasn’t much need to develop vocabulary in any language to distinguish planets, but the relatively recent invention of telescopes changed that. English, which has the richest vocabularly of any language has a similar problem, as “Earth” can also mean “dirt” as well as the planet we live on.
One could look for deep meanings in all this, but in reality, it’s a matter than words generally don’t get invented for things that people never have to deal with.