Hi, I am Sumdream for china to report bug. The problem is that after I translated lang.properties into Chinese, he have found that the rival commands are no longer recognized by the console while with the unmodified lang.properties those commands are successfully executed. I doubt it is a bug related to the plugin. I hope you can have time to take a look. Here with the modified files attached. http://pastebin.com/k3zbDMUa