A simple plug-in that displays flag icons that link to other language versions of your blog.
It does what it promises, and you can change the url of the language version like you wish, e.g. I changed it from /se/ to /sv/ for swedish, you can also change the flags that come with this plugin to your own flag images. Works fine. I use it in combination with a Woo theme, Woo commerce and Stella for the multilingual pages.