peterwsterling

This plug-in allows you to record a country against your posts. 
For example the country that the post talks about, the event took place in, the location you are writing the post from, etc. Your imagination is the limit… 
Once a post is tagged with a country the plug-in allows flag icons to be added to your blog’s pages with simple additions to your template files. 
Country icons can be clicked on to take the user to a list of posts from that country. 
There’s also a sidebar widget that creates a popup to navigate to posts from that country.
Please consider supporting ongoing development of this plugin by taking a look at the <a href='http://www.sterling-adventures.co.uk/blog/2013/09/01/wordpress-mapping-plugin/' rel="nofollow ugc">enhanced mapping version of this plugin</a> available at the <a href='http://www.sterling-adventures.co.uk/blog/2008/04/01/post-country-plug-in/' rel="nofollow ugc">plugin’s home page</a>. The enhanced version offers a neat mapping interface to your blog with many features such as geo-location of your posts, showcasing <a href='http://en.support.wordpress.com/featured-images/' rel="nofollow ugc">featured images</a> from your posts, presentation of <a href='http://en.wikipedia.org/wiki/GPS_eXchange_Format' rel="nofollow ugc">GPX</a> tracks, GPX elevation graphs, recording countries against your posts, and much much more.
<h4>How to record a Country against a Post</h4>
To add a country to post use the In which Country was the Adventure? box select the country from the dropdown. 
There are also more instructions etc. on this <a href='http://www.sterling-adventures.co.uk/blog/2008/04/01/post-country-plug-in/' rel="nofollow ugc">page</a>…

Post Country

This plug-in allows you to record a country against your posts.

julienvdg

hreflang Flag plugin uses <a href="http://www.w3.org/TR/css3-selectors/#attribute-selectors" title="W3C CSS3 Attribute selectors description" rel="nofollow ugc">css3 selectors</a> to add a flag icon to your links depending on their <a href="http://www.w3.org/TR/html401/struct/links.html#adef-hreflang" title="hreflang attribute description on W3C" rel="nofollow ugc">hreflang attribute</a>.
This is really useful if you regularly link to pages in other languages and you want to inform your visitors about the language of the link target.
It’s even more useful if your own blog is multilingual.

hreflang Flag

Add a flag icon to link corresponding to the hreflang attribute.

Post Country vs hreflang Flag