Open any Office for Mac application. For example, Word.
Click the Word menu, or the menu for the Office application you opened, and then select Preferences.
Under Authoring and Proofing Tools, click East Asian Languages.
Select Japanese, Simplified Chinese, or Traditional Chinese.
You'll be prompted to restart the Office application to apply the change.
Open the Office application that you want to use an East Asian language in, and open a worksheet, document, or presentation.
All of the East Asian language fonts and tools are available for use in the application.
Jul 02, 2016 Office for Mac 2016 automatically changes the language it uses for all it's menu items and settings based upon the language you have OSX set to. I want to be able to use OSX in English but use Office for Mac 2016 in a different language (in my case; Dutch). After you change the default editing language, you need to close all your Office 2010 programs, and then open them again for the change to take effect. If for some reason, your default display or Help language is not available, Microsoft Office uses the next language in the list that is available.