I came across this site while wandering the ‘net the other day. It’s the site of Dr. Stephen Huffman, who has done a lot of work in the realm of language classification and as part of his process has created colour coded maps that overlay the languages spoken across the geographic areas.
The site has a handful of large PDF files like he image displayed above. Within them you can drill down into regions and see the prevelant langauges for each region. Defenitley worth a glance if you’ve got a few minutes.
Now if I can just squeeze a good deal on printing out of my wife that world map would make a pretty good poster for the office wall.