How can I change the language of the login page or registration form?
The language of the login page or registration form is based on the setting of your browser, the page will take the main language defined in your browser.
How to change this language in:
Chrome : https://support.google.com/chromebook/answer/1059490
Firefox : http://mzl.la/1KC5WH3
KBA , BPI-SIG-CA-SEC-UM-IN , Invitations / License Management for SAP Signavio , How To