Just a simple chat filter on the client side for 1.21.1 NeoForge 21.1.117 (not tested on others).
The mod is installed in the mods folder of your game directory.
Start game once and edit config/xlchat.txt to add triggers.
# One trigger - one line
# The entry of the line into the message => the message is not shown
# Lines starting C # are ignored
#
bad_word
spam_link
