These flags correspond to the translation of "German, Chinese, Japanese, Korean, Arabic, French, Portuguese, Spanish and Italian languages.
Wouldn't you just click away from a site in another language without translation flags or tools? I'm not mean but I just can't read foreign. I added the common flags one by labnol. Very easy to install... just copy and paste into any html. You can even format it to your liking the way I have done on the top-right area of my blog.