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One project I worked on had 10 different languages. That was rough. But even your basic full stack web application is usually 5 languages: SQL, a backend language, HTML, CSS and JS. Usually some wheel reinventing frameworks thrown in for good measure. 5 languages is light these days.
And don't forget the CI "language" plus a bunch of bash scripts, Helm, Kubernetes, etc.
Probably a bunch of hacked together Python to copy stuff between fileshares. Bonus points if it runs with a .bat file and a Windows scheduled task.
Without Ansible or Terraform? What about SQL specific for each rdbms?
I work in Java, Golang, Python, with Helm, CircleCI, bash scripts, Makefiles, Terraform, and Terragrunt for testing and deployment. There are other teams handling the C++ and SQL (plus whatever dark magic QA uses).