-my $title = 'Post '. FS::payby->payname($payby). ' payment';
-$title .= " against Invoice #$linknum" if $link eq 'invnum';
+my $title = mt('Post '. FS::payby->payname($payby). ' payment');
+$title .= mt(" against Invoice #[_1]",$linknum) if $link eq 'invnum';