We have full language support for Python, see https://sourcegraph.com/github.com/ansible/ansible/-/blob/co....

We also have symbol support for Ruby and many other languages, see https://sourcegraph.com/github.com/Homebrew/brew and symbol search screen recording https://cl.ly/0p2a131B3r04.

-- Linda, PM @ Sourcegraph

Is there a list of what exactly are these 75 languages ?

Yep. Sourcegraph uses Universal Ctags in our symbol search, you can see the full list of supported languages here https://github.com/universal-ctags.