Which is the most commonly used web language?

It's hard to pinpoint *the* most commonly used web language as different languages serve different purposes. However, if we're talking about front-end development (what users see and interact with), then the answer is JavaScript.

Here's why:

* Ubiquitous: It's the only language supported by all major web browsers, making it essential for interactive elements, animations, and dynamic content.

* Versatile: It can be used for both front-end and back-end development with tools like Node.js.

* Large Community: A vast community of developers contributes to a vast library of frameworks, libraries, and resources.

However, other languages are also important:

* HTML is the foundation of every webpage, defining the structure and content.

* CSS styles the appearance of a webpage, controlling layout, colors, and fonts.

While JavaScript is the dominant player in the front-end, the web is a complex ecosystem with a variety of languages working together to create the websites and applications we use every day.