$MSWord = Win32::OLE->new('Word.Application', 'Quit') or die "Coul
+d not load MS Word\n";
    $wd=Win32::OLE::Const->Load($MSWord);
    $doc = $MSWord->Documents->Add();
my $range = $doc->{Content};
    $range->{LanguageID}=2057;
    $range->{Text} ="$word";
    eval {$range->InsertParagraphAfter();};
    if($@)
    {
        print "Error occur for word :: $word in English UK Function In
+sertParagraphAfter\n";
        open  er,"$0_Error_Log.txt";    
        print er "Error occur for word :: $word in English UK Function
+ InsertParagraphAfter\n";
        close er;
        return;
    }
    
    my $suggestions = $range->GetSpellingSuggestions();
    my $result_UK;
    my @suggestions_UK;
    my $offset = pos($word) - length($word) + 1;
    my $term = { term => $word, offset => $offset };  
    if ($suggestions || $suggestions->{Count})
    {        
        my @suggest;
        my @errors;
        foreach (in $suggestions) 
        {
            push @suggest, $_->{Name};
        }
        $term -> {type} = 'guess';
        $term -> {guesses} = \@suggest;
        push @errors, $term;    
        foreach my $word(@errors)
        {
            my $guesses = $word->{'guesses'};
            @suggestions_UK = @$guesses;                        
        }
    } 
$doc->{Saved} = 1;
    $doc->Close();
    $MSWord->Quit();
[download]

VB Macro code as requested, 'fraid you'll have to convert it to perl yourself.

Sub UKEnglish()
'
' UKEnglish Macro
' Macro recorded 2/22/2010 by  Clive Darke
'
    ActiveDocument.AttachedTemplate.LanguageID = wdEnglishUK
    ActiveDocument.AttachedTemplate.NoProofing = False
    Selection.LanguageID = wdEnglishUK
    Selection.NoProofing = False
    Application.CheckLanguage = False
End Sub
[download]