I really like this plugin and I don't have words to thank you your effort Qian Qin.
I have installed your plugin in my blog http://corbacho.info/finlandia (check that flags are floating) allowing you to show the flags in the sidebar with the widget for Wordpress. But I think that they can be unnoticed, so I will show you what I have done for spot the flags more easily. It's really easy trick with CSS.

If you have wordpress 2.7, go to the sidebar Appearance -> Editor -> style.css and at the end of the file put these two lines with your languages codes:
- Code: Select all
.qtrans_flag_en { position:fixed;top:20px;left:2px;border:1px solid #BBBBBB }
.qtrans_flag_ES { position:fixed;top:40px;left:2px;border:1px solid #BBBBBB }
If you have a file called style.php you will have to do the same there too.
In my case is Spanish (.qtranslate_flag_ES) and English (_en), but yours can be different.
Try different distances in top and left.
If you wish to put them floating in the bottom of your page use bottom instead of top
