If you have multiple languages installed with Office, the Backstage view (the page that displays your product information) may be displayed in a language that's different from what you expect. For example, if you purchased Office in English and then installed a Language Pack or Language Accessory Pack, the product information will appear in the last language installed.
To see product information in the first language installed, visit your My Office Account page.
Notes: The Office Backstage view can be found in the following locations:
Office 2013 and Office 2016: File > Account
Office 2010: File > Help