[thelist] Multi-language site infrastructure?

[Peter Loron]

I'm looking into making some of the sites I create have support for 
multiple languages. Something similar to the capability at:

http://news.bbc.co.uk

Any references or example code people can point me at? Specifically, 
I'm looking for ideas/best practices, etc on how to architect the pages 
and backend code (I typically use PHP) so that I can minimize the 
duplication of effort for each language. Thanks!

-Pete