Web pages are generally written using HTML as their primary language. HTML is Hyper Text Markup Language.
HTLM is what web pages were originally written in and continues today. We are now using version 5 of HTML or HTML5. If you see the extension (the last part of the name) of the web page file and it is HTM or HTML (not case sensitive) then that page is written basically in HTML
Pages can also be written in several of Microsoft’s language.
However, most pages are still using HTML as their base and with HTML5 many features were added that used to require an add-on language so HTML is thriving.
Whether you write your own code or use a page generator like WordPress or Dreamweaver you will find the pages that were generated are HTML pages.