As you may already know that Google Assistant adds up Google’s search functions along with some basic info on our smart devices, so in simple you can say its an artificial intelligence.
If you visit Wikipedia, they’ve mentioned only one platform, i.e. C++, but.. its not the only one. Programming languages such as Java and Python are widely used as well thanks to its simplicity and easy understanding in coding. Although you can say that Google assistant is mostly made up of C++… and of course if you want to be certain about this, you can always check the coding/language requirements for Google, they’ll definitely ask for these :
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