[XeTeX] [OT] OpenType Turkish language tag

[Will Robertson]

Hey,

Ralf has reminded me of a discrepancy between what the OpenType  
Turkish language tag should be and what it is defined as in fontspec.

The spec says that the Turkish language tag is "TRK":
   <http://www.microsoft.com/typography/otspec/languagetags.htm>

But Adobe Garamond Pro (and others) have "TUR":
  
  
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So, which one should I be using?
Can anyone clarify this within Adobe?

Cheers,

Will