Load + parse EVERY copy of a locale resource, highest precedence first (empty when none exist).
This is what makes a user-installed pack ADDITIVE rather than all-or-nothing: manifests are unioned
across roots so a root can contribute a locale we don't ship, and message files are merged so a root
can override a handful of keys without restating the catalog.
Load + parse EVERY copy of a locale resource, highest precedence first (empty when none exist).
This is what makes a user-installed pack ADDITIVE rather than all-or-nothing: manifests are unioned across roots so a root can contribute a locale we don't ship, and message files are merged so a root can override a handful of keys without restating the catalog.