Asked to play a song, Google Assistant in Android Auto replied with the typical “Sure” followed by a response in a totally random language, even though the chances are the user never configured it on the Android device.
And while seeing Google Assistant picking a totally unexpected language to answer to the voice command, this is something that’s already been acknowledged by Google itself.
It’s a known problem that the company is currently working on, as Google Assistant in Android Auto sometimes responds in a language that’s different from the one configured on the phone.
“Thanks for the reports. The Assistant team is aware of this issue and currently investigating. We'll share more updates on this thread. Thanks!” a member of the Android Auto team recently said. “If your Google Assistant reads text messages in the wrong language, remove English as a secondary language. Then change your Google Assistant’s voice language to match your Google Assistant’s language.”
So technically, what you need to do to prevent this from happening is just remove English from the Google Assistant language settings. If it’s configured as the secondary language, the Assistant sometimes uses the primary language on the device to answer your voice commands.
At this point, it’s still not known when and if a fix for the whole thing is on its way to Android Auto users, but for the time being, the aforementioned workaround is the best way to go. And of course, worth knowing is that this doesn’t happen to everyone, but only to some of the users who rely on Google Assistant for voice control.