The trick was getting the language code once I got the Win32::Exe object - and it isn't exactly the cleanest code in the world. I had to poke into the object to get it, because there isn't a documented interface for it. 
my $language;
my $exe = Win32::Exe->new( $name[$object_id] );
my $vi = $exe->version_info();
if (defined $vi) {
  # To load the variable used below.
  $vi->get('OriginalFilename'); 
  $language = hex substr $vi->{'cur_trans'}, 0, 4;
  # $language is now the language IN DECIMAL.
  # To get a hex number, drop the 'hex' before the substr.
}

# use $language if it's defined.
...

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In reply to Re^2: How to detect that a Windows DLL has a version resource, and pull data from it. by CSJewell
in thread How to detect that a Windows DLL has a version resource, and pull data from it. by CSJewell

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