I've written a simple multi-language system, whereby clicking on a flag icon sets a one year cookie containing a two letter language code (e.g. nl, de, etc).
I hook into the
wp action to read the cookie value, then use the
the_content filters to show the correct language (the different languages are entered via metaboxes on the page/post edit screen).
This all works great except I'd also like to have permalinks for each language version whereby the two letter language code is between the domain name and the usual permalink structure. I'm using the
%postname% permalink structure, so all the following would be valid:
http://example.com/nl/about-us http://example.com/de http://example.com/fr/2012/03 http://example.com/es/this-is-a-post-title
If the current language is English, then no two letter code should be used (it will just be the normal permalink).
So far I have used the
query_vars filter to add a query var called
lang, but that's sa far a I've got, I'm unsure what the next steps are. Any advice much appreciated!