Programming languages used in most popular websites WebsitesPopularity (unique visitors per month)Back-end (Server-side)Google1,600,000,000C, C++, Go, Java, Python, NodeFacebook1,120,000,000Hack, PHP (HHVM), Python, C++, Java, Erlang, D, XHP, HaskellYouTube1,100,000,000C, C++, Python, Java, GoYahoo750,000,000PHPProgramming languages used in most popular websites – Wikipedia en.wikipedia.org › wiki › Programming_languages_used_in_most_popular…