[Inkscape-translator] where is this string in practice (from /share/extensions/gimp_xcf.inx)

I like to know where (or how) can I see these string in practice:

#: ../share/extensions/gimp_xcf.inx:3 msgid "GIMP XCF"

#: ../share/extensions/gimp_xcf.inx:9 msgid "Save Guides"

...

Obviously it belongs to an extension, but which one ? There is nothing GIMP-related in extensions list – at least not in their names.

Thank you, Cristi