I have no idea about Gold colored but the stuff in parenthesis is usually the auto translated stuff. If you hit the tab key while you're typing a word and it's a word or phrase they can translate for you, you'll see a list of options pop up. Like buy, sell, trade etc can all be auto translated but if you try to do that for buff, all you can auto translate is buffalo leather etc. :P But maybe you already knew that and you're asking about something else. I also haven't messed with the menus that pop up when you try to auto translate and there's nothing for it so maybe this gold text has something to do with one of those in that case.