Multi-Language Wordpress and WPMU

Simple.

1. Go to http://codex.wordpress.org/WordPress_in_Your_Language and find the version in the language of your choice.
2. You’ll be taken to a page in that language – but it’s similar enough to the main wordpress download page that you’ll be able to tell where to click for a download.  So download it.
   Polish Multi-Language Support for WPMU/Wordpress
3. Open the zip file and extract the contents of wp-content/language.  Then upload this directory to your Wordpress/WPMU installation.  (wp-content/language doesn’t exist in the default English Wordpress install.)
4. To set the language go to Settings -> General and look near the bottom of the page.  You’ll now have an option that wasn’t there before.

   

   WPMU/Wordpress Localization Selection (2.6.5)

Note that the language files are the same for WPMU and Wordpress – the WPMU-specific “Site Admin” menu translations are included in the language files. Nice!