How do I change the server language or disable achievements/chat filtering?
A few different "housekeeping" settings often get grouped together: broadcast messages for advancements, chat reporting/filtering, and server language. Here's how each is handled.
Achievements and advancements
To stop the server broadcasting advancement messages to everyone, run in the Console:
/gamerule announceAdvancements false
Chat filtering and reporting
On Paper, you can set enforce-secure-profile=false in server.properties to remove chat reporting. Be aware of the trade-offs that come with disabling secure chat. A dedicated "no chat reports" plugin does the same thing more cleanly.
Server language
The server software itself isn't localized. The message text players see comes from your plugins and configs, so that's where you'd translate or customize wording.
Tip: After editing
server.properties(likeenforce-secure-profile), restart for the change to apply.
Frequently asked questions
How do I stop "so-and-so has made the advancement" spam? Run /gamerule announceAdvancements false in the Console.
Is disabling secure chat safe? It removes chat reporting, but understand the trade-offs first. A purpose-built "no chat reports" plugin is often the cleaner choice.
Can I change the server into another language? Not the core software — but the text players actually read is set by your plugins and their config files, which you can translate.