Your GreyMetrics account language can be changed within the Company Profile section of your account.
This is accessed by clicking the profile icon at the top right of the screen:
Select 'Company Profile' , the drop down list of supported languages is available on the right handside of the page, under the image logo section:
Choose your desired language and all fields within your GreyMetrics account will automatically update immediately
NOTE - The chosen language is applied throughout your GreyMetrics account and cannot be amended for individual Clients