Have a world-alias section under chat in the config, which allows servers to set aliases for different worlds. These aliases can then be substituted into chat formats with a token like {WORLDALIAS}.

For example:

chat:
# ...
    format: "{WORLDALIAS} - {DISPLAYNAME}: {MESSAGE}"
    world-aliases:
        plots: "&lP&r"
        test: "&mT&r"

This would lead to messages being formatted as such:

P - MD678685: hello
T - LaxWasHere: ./supaham

If no alias is specified, it could default to the world name.

What that existed? LMAO :D nice work. I did not knew if that already In Essentials, sorry... And about global? And any suggestion to support skripts?

Will it release? And when? Psssss. And I gave suggestion on per World another or this same like world1: (world) nick and world: group: nick + if good i mean the format..

This is a feature request. It's not part of EssentialsX yet, but it's a suggestion.

Bump, and as an addition. It would be great if EssentialsChat could use the World Alias as set in Multiverse, as ./mv info already supports world alias.