You may think this is a fast and easy thing to do but no. Due to a recent project for the band ADAM I was researching this more in detail. Apparently wordpress wasn't made to be multi language blog and also the plugin world has problems turning it to one. Though here are 5 plugin that try it:
"5 Plugins To Build A Multilingual Website"
On my project I tried qTranslate. It looked promising but when adding a new language it got stuck. Sadly Slovene isn't a very popular language so it wasn't one of the standard ones. I'll see how it can be realized at the end.
Update: qtranslate turned out to be the one. I was able to add new languages and it works quite well. So it's the most recommended.