Google Now can use any laungage that Android supports

Modification lets Google Now for Android run in any language
As smart as Google Now can be, its language support is limited; it won't always display results in your native tongue, for example. Sletmo at XDA-Developers has partly solved this through a modification of the Google Now app. His tweak makes the search tool provide information in any language supported by Android itself -- if you'd like to get restaurant lists in Swedish, you can. The code is very unofficial and may not work with every device, but those who aren't daunted by the risks can check out the Google Now mod at the source links.