What server and language do you use for Raspberry PI

I have started working with Raspberry PI. I wrote a Python program that turns on/off LED on Raspberry PI board. I was working to control GPIO of Raspberry PI using web page. I know that I need web server and more then one programming languages.

I did google search and found out many information about web server and programming language. I have seen that projects have been developed using many servers like apache, Flask, pigpiod daemon..etc. Many languages like python, php, html, java...

What server and language do you use for Raspberry PI