Uninstalling: If you need to uninstall Office for Mac, you can follow these steps to completely remove Office for Mac. Unfortunately, there is no program to uninstall Office for Mac automatically.
Step 2. Search Language, or click advance to find language.
Step 3. Click the drop down icon. Then Click the more detail icon, after the drop down menu shows. Tick "Display Google Chrome in this language" and Click "Move to the top"
Change Language for Office Suite
How do I change office suite display language such as Word, Excel, PowerPoint?
There are quick method and "no need to think" method.