Wait, IT'S THAT SIMPLE? I WAS USING THAT OTHER NICK PLUGIN THAT NEVER WORKS! WEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE THX SO MUCH!!!!!!!!!!!!!!!!!!
lol
Ok, so there is a really good plugin called NickNamer. Please add it if you can. The links are https://www.spigotmc.org/resources/nicknamer-integrated-api.5341/ and https://www.spigotmc.org/resources/2930/ . Thank you for reading!