@EventHandler
      public void onPlayerChat(AsyncPlayerChatEvent event){
          String msg = event.getMessage();
          List<String> words = Main.plugin.getConfig().getStringList("swear-words");
          for(int i = 0; i < words.size(); i++){
              if(msg.contains(words.get(i))){
                  event.setCancelled(true);
                  event.getPlayer().sendMessage("You are not allowed to swear!");
              }
          }
      }

他确实传达了这样的信息：“你不能骂人！”但他没有删除聊天信息