Our verification emails are part of our general notification emails that an end-user can receive. This email will be sent to end-users when they have to verify they are the user associated with the accounts email address. The email will include a verification link and code. Administrators have the option to customize the language that is within the email.
Path: Community Settings >> General Settings >> Emails & Notifications >> Notification Emails >> Email Verification Notification
In the 'Editing' area you can see the current language used in the email. If you click the box next to 'Customized' then you will be able to edit the language. Don't forget to hit save after making your changes!