Here are some languages according to my knowledge:

HTML

HTML makes up the layout and structure for your website.
This language is dynamic and allows you to create a beautiful website using less code.
HTML is used to create a starting point for the website and
what most of your static pages start from.
A better way to understand this language is to consider it as
the skeleton that is holding your website together.



CSS

CSS is the language developers can use to style a website.
The style sheet language describes how your website is
presented and its layout. CSS is used hand in hand with HTML to add colors,
backgrounds, layouts, font sizes, and more.
This language is a core technology web developers use to design and build websites.



JAVASCRIPT

JavaScript is used in many aspects of web development.
Web developers use this language to add interactive elements to their websites.
User engagement is important to your business, and your web developer
should be incorporating JavaScript elements in your design.

PHP



PHP is often used on data-heavy websites or for app development.
This is an open-source language that can be easily modified
to meet the needs of your business or website. Large websites like
WordPress and Facebook use PHP to manage and process their data.



BOOTSTRAP

Bootstrap is a free front-end framework for faster and easier web development.
Bootstrap includes HTML and CSS based design templates for typography,
forms, buttons, tables, navigation, modals, image carousels and many other,
as well as optional JavaScript plugins.



.NET

.NET (pronounced dot net) is a framework that provides programming
guidelines that can be used to develop a wide range of applications
from the web to mobile to Windows-based applications.
The .NET framework can work with several web programming languages
such as C#, VB.NET, C++, and F#.



ANGULAR

Angular is a TypeScript-based open-source front-end application
platform led by the Angular Team at Google and by a community
of individuals and corporations. Angular is a complete rewrite
from the same team that built AngularJS. Angular is
a platform that makes it easy to build applications with the web.



REACT

React is a JavaScript library for building user interfaces.
React is used to build single page applications.
React allows us to create reusable UI components.