An effort that Google Now continue growing Google Search has been progressively adding multitude of languages through updates. The problem today is that if you usually handle two languages and want to do a search in which you have not selected by default you must change it in settings within Google Search.
Google will solve this problem in future updates, allowing us to select up to five languages to be used at the same time without having to make any changes in the settings of the application, to facilitate searches to those accustomed to use multiple languages in your daily life.
As we read in the source, this functionality would have already reached some devices allowing us to even, start our search in Spanish and complete it in another language without a problem. Currently there are no scheduled date so that it reaches all handsets, but thanks to the source we have some pictures where you can see the previously mentioned.