I'm not sure if this is off topic or not but I'm led to believe there are loads of languages spoken in the US (albeit with a lot of minorities). I guess you could argue that Sony's priority is to work for the majorities and get a bigger market share from the big groups or easy wins I suppose.
Just a couple of quick googles on languages spoken in the US, but I'm sure you can find more
http://www.nvtc.gov/lotw/months/november/USlanguages.html
http://www.clta-gny.org/news-interest-4.htm
The argument that demo's need to be certified for different countries does sorta make sense (i.e. if legally required and out of Sony's hands) but that doesn't stop the fact the people can easily create a US, Japan, Australian etc account and download content from one country to another (unless nationality preceeds the nation you are currently staying in?) as I was sure it was possible to block content by ip address, not that I want to lose out on any extra choice of content.
Anywho, there's a few games that should be coming to PSN that I'm really looking forward to: Wipout HD and Soldner-X for example
