I used Lua as a scripting language directly tied to C. It is useful for allowing scripts to interact directly with compiled code. The compiled code is still the focus, but the scripts allow changes without a recompile.

I used to like C#, but dotnet didn't become as portable as I hoped it would.

I use C (embedded), C++ (everything), Python (data manipulation), PowerShell (pipelines) and bash (pipelines).

I hope you can find a non-homework job to use whatever skillset you are developing.