Is there a way to change the way plugin messages and server messages are displayed, I would like to get rid of the brackets and put something custom or a way to change output messages after you type a command.
You should be able to edit it under the locale folder and chose the specific string of characters that corresponds to your language. I'm assuming it would be English, so "en" would be yours. You could edit the files in here, but it may take quite some time. I hope this helps you out. If you require further support, please reply to this post with an updated version of your issue and what exactly you have tried, so I can best assist you. Thanks!
