Google announced a change to the Google Search app for Android that enables you to speak different languages to Google without having to keep going in and changing the settings to do so.
Just change a setting one time, and you should be good to go. Google will understand you regardless of which language you decide to speak at any given time.
Google explains on the Inside Search blog:
For many people out there, speaking just one language isn’t enough. More than half the world’s population speaks two or more languages—and now Google can keep up. With the Google Search app on Android, you can speak in multiple languages and Google will understand you no matter which one you choose. So you can fire off a search for nearby restaurants in English, then dictate a text to your friend in French.
You can use voice search in more than 50 languages and dialects already, but previously you had to change your settings if you wanted to switch languages. Now, you can just make a small, one-time change to your settings, and then you can switch back and forth easily. Google will automatically detect which language you’re using. (For now, you need to stick to one language per sentence though.) You can select up to five languages total—enough to satisfy all but the most advanced polyglots. Whether you get a spoken response from Google depends on the language you use and your query (and you’ll see more languages and features added over time).
The feature requires version 3.6 of the Google Search App. To set it up, go to Google Settings from the apps menu on your device, then go to Search & Now, then Voice, then Languages. From there, simply select the languages you want to be able to speak. Simple as that.
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