One of the things most often wondered about is which language those popular social networks and search engines are coded in. Let’s review a few examples together.
While Facebook was originally coded in PHP, due to evolving needs over time, HACK, a version of PHP developed by the Facebook team, is now used. In fact, so much so that while Facebook was struggling to solve many different problems, it pushed the limits of JavaScript and developed libraries such as GraphQL and react.js.
What are the other sites written in PHP?
Wikipedia
Udemy
What are the sites written in Python?
Google
YouTube
Apart from these, Ruby is also a widely used language. The website you are currently using is also written in this language.