This is a simple plugin I whipped up because I needed it on my server.
It is installed on bungee and hooks into PremiumVanish installed on the bungee side. It prevents vanished players from talking. (can be bypassed by starting the message with a \)
Requires
PremiumVanish to be installed on bungee along with this plugin.
THIS IS A BUNGEECORD PLUGIN, NOT A SPIGOT ONE
If you try to put it in the spigot plugins folder, it will not work.
I will probably not be updating this plugin with more features because its mostly a one-off thing I made for my server.