Values:
LOCALIZATION_STATE_UNSPECIFIED (0):
Not used.
LOCALIZATION_STATE_NOT_APPLICABLE (1):
Localization is not applicable for requested
language. This can happen when:
The requested language was not supported by
Advisory Notifications at the time of
localization (including notifications created
before the localization feature was launched).
The requested language is English, so only the
English text is returned.
LOCALIZATION_STATE_PENDING (2):
Localization for requested language is in
progress, and not ready yet.
LOCALIZATION_STATE_COMPLETED (3):
Localization for requested language is
completed.
