I would put these in separate files in another directory and add the directory to the i18n load path.
e.g.
config/localized_config/pt
config:
default_location:
location: Lisbon
...
Then you can do I18n.t('config.default_location.location')
and it should grab the right translation based on the current locale.
How to add to the i18n loadpath is covered here:
http://guides.rubyonrails.org/i18n.html#configure-the-i18n-module
This way you can re-use the built in functionality without having to put sensitive or non relevant translations in the main translation files.