Folder name in sidebar is changed, how to get it back?

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http://superuser.com – My OSX is Simplified Chinese, so the user folders in finder's sidebar is like this: AirDrop 应用程序 桌面 文稿 下载 影片 音乐 图片 These stand for AirDrop, Applications, Desktop, Documents, Downloads, Movies, Musics and Pictures. However, now with an accident, my "Downloads" folders in sidebar is changed to its original english name, and I don't why, so my sidebar is now look like: AirDrop 应用程序 桌面 文稿 Downloads 影片 音乐 图片 I know do symbol link to these folders would cause such case but I cannot find any symbol links to my ~/Downloads folder. So (HowTos)