Why?

The way world labels currently work when sending messages to Discord relies on MultiverseCore, which is not the only multiworld plugin. Adding a dedicated way to make world aliases would be much easier for people who use different multiworld plugins (ex: MyWorlds)

What and How?

It could be done like EssentialsXChat, where you could set each world to an alias.

Each world has its own name, so it could go like this in messages.yml:
world: "Survival"
world_nether: "Survival"
dayton: "Creative"
etc... and so on

Are there alternatives?

I can't really think of a different way of doing this, MyWorlds doesn't have native world aliases so you really can't just pull from it.

Checks

• I have used the search at least once to check if my idea has already been suggested and perhaps already implemented.

Anything else

No response

Could this not be done via LuckPerms and using the world context? set a different prefix based on the world the player is in?