The programming language created by Google in 2009 is Go.
Go was designed at Google in 2007 by Robert Griesemer, Rob Pike, and Ken Thompson, then publicly announced in November 2009. The language was created to improve programming productivity for large software systems running on multicore and networked computers. Its designers wanted the efficiency and static typing associated with C while making development simpler and more readable.
Go includes garbage collection, a large standard library, and built-in support for concurrent programming. Its goroutines and channels make it practical for network services and other programs that perform many operations at once. Google uses Go in production, and the language is also widely used in cloud infrastructure, command-line tools, and web servers.
The wording can cause a small historical confusion: 2009 was the public announcement and open-source release, not the beginning of the design work. Go 1.0 followed in March 2012. Some people call it “Golang,” a nickname linked to the golang.org website, but the language's official name is simply Go.