Sovit Tamrakar

World Flag is WordPress Flag Plugin which will ease the writer/authors to add flags to posts or pages with shortcode.
Tinymce Editor button has been added to ease the usage of plugin with few clicks of button.

World Flag

World Flag - Country Flag using shortcode.

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.

World Flag vs hreflang Flag