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Will replace all instances of the player name in chat messages and the tablist with a custom replacement.
A /namereplace command exists that allows you to add, remove, or clear player names from the replacement list. Requires permission level 3 by default, but it can be changed in the config.
/namereplace add <name> <replace_name>: Adds a name to replace. Will overwrite existing names./namereplace remove <name>: Removes a name from the override list./namereplace list: Prints current name replace table/namereplace clear: Removes all name overrides.By default, there is also a /replacename command alias registered that redirects to the normal command. It can be disabled in the config.

Serverside mod that allows replacing a player's name in the tablist and chat messages