How are additional languages added to a Community Site that aren't in the dropdown upon the initial site creation? Also, how would you create a community site or community site structure for US Spanish vs Spain Spanish vs Mexico Spanish for AEM Communities?

So, we have an enablement community and have turned off anonymous access and modified the Login Selector as described here [1] but cannot access the Forgot Password page.  What needs to be changed to allow anonymous access to the pages under useraccount?[1] - Communities Sites Console