[ Thanks to Falko
Timme for this link. ]
“This tutorial explains how to use the GeoIP module with nginx
on Debian Squeeze/Ubuntu 11.04 to find out where your visitors come
from. The GeoIP module sets multiple variables like
$geoip_country_name, $geoip_country_code, $geoip_city, etc. that
you can use in your PHP scripts or directly in your nginx
configuration, for example to serve content in different languages
based on the user’s country. “