Actually Talia rely on Globalize for i18n. In order to be ready for the i18n API of the upcoming Rails 2.2.0, Luca has created an ad-hoc plugin.

Traslations are namespaced (look at the attached file) and stored inside a YML file. For fetch a certain value, you should pass the whole path as symbol to the #t helper.
<%= t(:'activerecord.errors.messages.invalid') %> #=> "non è valido"

The following "namespaces" will be used for Talia translations:

talia: # All Talia Strings
  global: # Strings globally used in the whole application
  start_page: # Strings specific for the start page
  facsimile_edition: # Strings used in the facsimile editions
  media: # Strings used in media-related views