Those developers at the Document Foundation are coding like madmen!
The first release candidate of the Libre Office suite of programs has seen the light of day. And of course I put my computer to work, and the result is a series of Slackware 13.1 packages for 32-bit and 64-bit LibreOffice, including a bunch of language packs. Please tell me if your language is missing.
Get the packages here: http://slackware.com/~alien/slackbuilds/libreoffice/ or from one of my mirrors: http://taper.alienbase.nl/mirrors/people/alien/slackbuilds/libreoffice/ and http://slackware.org.uk/people/alien/slackbuilds/libreoffice/ . Both mirrors have rsync access.
If you want to use my libreoffice.SlackBuild to compile these packages yourself, the script will first download an additional 200 MB of external source tarballs before commencing with the compilation. I decided not to store all these sources in my own build directory, in order to minimize the load on the server.