I'm currently developing a website which is to be Dutch and English. Anne van Kesteren writes here about how to display this in your website structure. He basically offers three options:
Anne seems to go for the first option, because adding directories doesn't seem like a nice solution. Besides that
..ct?lang=nl.. looks awful.
I'm not really sure which option I like best. The second option
is most definitely out, but I'm undecided between the other two.