My preferences are always Go first and Python if there are specific libraries that make my life easier.

Go is a simple target for LLMs as the language has changed very little and with the Jetbrains go-modern-guidelines[0] skill the LLM can use the handful of recent additions effectively

And with Python there are things like ruff and pydantic that can enforce contracts in the code.

[0] https://github.com/JetBrains/go-modern-guidelines