Speak five different languages, and Google Search will still understand you
Select up to five languages for Google Search to understand during one session
With the change, Google Search will automatically figure out which language you are using and will respond to you in that language, if it is warranted. The new feature is on version 3.6 of Google Search, which can be found in the Google Play Store. From your device's apps menu, select Google Settings, and click on Search & Now -> Voice -> Languages, and select the languages you want to use. It can't be any easier. And yes, once again Google makes this a much smaller world.
Things that are NOT allowed: