'The mailbox is already occupied', 'Username is already taken' => 'Username is already taken', 'Nickname is already taken' => 'Nickname is already taken', 'Phone Number is already taken' => 'Phone Number is already taken', 'Mobile number does not exist' => 'Mobile number does not exist', 'Email does not exist' => 'Email does not exist', 'Incorrect verification code' => 'Incorrect verification code', 'Verification code has expired' => 'Verification code has expired', );