Recently I've been experimenting with using multiple languages in some projects where certain components have a far better ecosystem in one language but the majority of the project is easier to write in a different one.

For example, I often find Python has very mature and comprehensive packages for a specific need I have, but it is a poor language for the larger project (I also just hate writing Python). So I'll often put the component behind a http server and communicate that way. Or in other cases I've used Rust for working with WASAPI and win32 which has some good crates for it, but the ecosystem is a lot less mature elsewhere.

I used to prefer reinventing the wheel in the primary project language, but I wasted so much time doing that. The tradeoff is the project structure gets a lot more complicated, but it's also a lot faster to iterate.

Plus your usual html/css/js on the frontend and something else on the backend, plus SQL.