In order to add profiles for your family members, start by selecting your name or email in the upper right corner of the screen.
Click Edit Profile.
Select My Family Profiles.
Click Create a new profile.
Enter your family member's name, and create a unique username and password for them. Then click Create this Profile.
Now they can log in to Mango Languages with the username and password you set. Later if you select their name from the My Family Profiles page, you will be able to view their study progress.