PPTX: Not all master content is exposed for translation

[GoogleCodeExporter]

Reported by a user.

Extract text from the attached PPTX file, with "Translate Masters" enabled.  
Master content for the body slide ("Click to edit Master title style", ..., 
"Fifth level") is exposed correctly.  However, this is not the only master 
content in the document.  There is also a title master used by the first slide 
of the presentation, which contains the strings "Click to edit Master title 
style for slide 1" and "Click to edit Master subtitle style for slide 1.  This 
content is not exposed for translation.

Original issue reported on code.google.com by tingley on 2 Mar 2015 at 10:32

Attachments:

• masters.pptx

[GoogleCodeExporter]

So looking at this further, it turns out that the untranslated content isn't 
actually in the master, it's in the slide layouts.  For more background, see 
here:
https://support.office.com/en-ie/article/Create-and-customize-a-slide-master-0fb
cae59-6eda-4abe-b35f-821b87f5d03e?ui=en-US&rs=en-IE&ad=IE

It's not clear to me if the current behavior is correct or not.  I need to 
follow up with the user.

Original comment by tingley on 7 Mar 2015 at 6:28