What language google written in

Google uses the Java programming language to build and develop the Google Docs applications . The user’s side of the system — what would be called the client side in a traditional network — consists of Web applications enhanced by the Javascript programming language. Javascript and Java aren’t the same thing.

Most of Google is C++ .

Most of Google is C++ .

Python is recognized as an official language at Google, it is one of the key languages at Google today, alongside with C++ and Java. Some of the key Python contributors are Googlers and they continue to use, promote, and support the language actively.