i wouldnt really call these programming languages but they are good languages to know i know HTML, PHP, MySQL, Visual Basic. Visual basic is an actuall programing language but i really suggest learning PHP and MySQL they are some of the most useful web languages you can learn databases are extremely important in web development. to explain further PHP is the programming language that allows you to have dynamic things on your page like logins ect and the database, mysql, actually stores the info like user names and forums posts ect. all the posts on this forum are saved in a MySQL database