The joys of working for a company with in house developers, as long as I don't use something that would be extremely difficult to bring a new developer up to speed on (accounting for the necessity of said solution as well) I can generally make a case to use whatever.
I've got a mix of C#, Python, Kotlin and pl/pgsql code running in production right now and we've also for projects written in Node.js that are live as well. I've even got some F#!
On my .NET projects we get a full installation from Visual Studio on the development machines. Which means C#, F#, C++ and VB.NET available.
On my Java projects those machines have usually Eclipse + JDK. JARs are either vendored or make use of an internal Maven server.
I am yet to be allowed to use anything other than Java (the language) on those kind of projects.
Most customers want replaceable consultants so they don't allow us to go outside of their standard stack.