Geany is a great, lightweight FOSS editor that totally respects your privacy, and supports all if the languages you mentioned, plus many more.

You can use VSCodium, it’s VSCode without Microsoft telemetry

pluma is good. i used it until switching to vim/emacs https://en.m.wikipedia.org/wiki/Pluma_(text_editor)

I would check out Lapce and CudaText. They are both solid editors. If you are comfortable in the terminal, then nvim as well, of course.

vim

WTF is a “privacy-focused code editor?” They’re just glorified text editors! They run locally! They don’t connect to the Internet at all! How would they be anything other than “privacy-focused” by default? Why is this even a question?!

I fucking hate this timeline.

Anyway, to answer your question: emacs, obviously. Or vim if you’re evil, I suppose. Or just whatever the Hell you want, because if your editor even has “terms of service” or a “privacy policy” of any kind something has already gone horribly wrong.

VSCodium

If you’re just writing those languages, here are my picks:

For Linux and Unix:

• Xed (just called “Text Editor” in the menu)
• Geany
• Notepadqq
• Micro (terminal, but very friendly)
• Nano (also terminal, also friendly)

For Windows:

• Notepad++
• VSCodium

For macOS:

• Micro
• Nano
• VSCodium

i like Pulsar