Sure I live in Sweden, and maybe we don't need wikipedia search result D) but I want to get wikipedia search result anyway, is there a way or a hack to make this available anyway in OS X Yosemite.
I think it works if your system language and region (System Preferences > Language & Region) match one of the countries shown in the table here: http://support.apple.com/en-gb/HT203090. For instance, my system language is English (UK) and my region is United Kingdom, even though I live in another European country that is not supported yet. I found that it doesn't work if either one of these settings doesn't match, so you can't mix unfortunately.