Steps to reproduce:
1. Deploy the jsf-registration-portlet.
2. Navigate to the jsf-registration-portlet by selecting the Create Account link from the built-in Sign-In portlet.
3. Fill out the form and hit submit.
If the bug still exists, you will see the following success message: "thank-you-for-registering".
If the bug is fixed, you will see a localized version of the above message.
Note: I reproduced this bug on Liferay 6.2 + JSF 2.2, but before closing this issue, Liferay 7 must be tested as well.