Am I correct in assuming localizations are performed based on your app context and that non-visible apps do not need locale specified?
are you talking about translation?
Or localization for normalisation, ie. windows events from non-US windows Operating system have locale fieldname and values?
I am talking about language translations in Splunkweb:
http://www.splunk.com/base/Documentation/4.2.1/Developer/TranslateSplunk
