Hola

The config file can be found at mods/hola/config.json

{
  "c1": "This message gets sent to the new player when they join the server.",
  "message": "Welcome to the server! We hope you have a great time here.",
  "c2": "This message gets sent to all other players excluding the new player.",
  "message-other": "Give a great welcome to {player} to the server!"
}