There are myriad langauges. My main goto is Python. For the web I like to write Javascript and HTML without much in the way of frameworks. As is standard these days, I use Markdown for writing documents in plain text. My favourite editor is VIM, followed by VS Code, though I use Windows Notepad a lot, as well as cat > my_script_name for writing short scripts without launching an editor (and usefully, with the cat> approach, you can see terminal output above while writing the script, and as an exercise it is a great way of forcing you to think as you type, since once a line has been entered, you can't go back without loading the script in an editor.