[libreoffice-l10n] How does one find specific strings in the po files?

Saluton

When LO starts up there is a splash screen with
"Libreoffice 3
The Document Foundation" and a progress worm,

and then another splash screen with
"Libreoffice 3
The Document Foundation
Text Document    Drawing..."
etc, finishing with
"Open...        Templates..."

Is there any documentation on how to find where these strings are in the 
UI po files?
In the Esperanto version of 3.5.0 beta, the strings "Open... 
Templates..." are untranslated, and I have not succeeded in finding 
them. I used Pootle to search every instance in UI of "Templates" and 
failed to find any that are untranslated.

Thanks
Donald

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