1、右键点击Netbeans的快捷方式，选择属性

2、在目标后面添加 --locale en

In Mac OS X

应用程序-->netbeans folder-->netbeans.app-->Command + ARROW_DOWN-->Netbeans 8.1 app-->Content-->Resource-->etc-->netbeans.conf

modify netbeans options, append "--locale en_US" at the end of the line of the options.