Well, the TypeScript and .NET organizations live within the Developer Division, and now we have Guido so there's Python. We also have fairly substantial dev tooling teams for C++ and Java so I imagine some of the contributors are there. We also have Node.js contributors as well as Electron (due to VS Code). Source: I work in DevDiv as well.
Microsoft has had a Python tooling team in DevDiv for almost 10 years now. Originally, we were primarily working on Python support in Visual Studio proper. We also took the first crack at Node.js support in VS - also before VSCode was a thing.
Aside from that, Microsoft also owns the VSCode extension for Go, so there's that team, as well.
