According to internetworldstats.com, the top three most used languages on the internet are English, Chinese, and Spanish.  Quickest growing language is Chinese, which gained some 1087% during last decade. Spanish increased by 650% and English by 237%.

Good News! According to Google Unicode is used on almost half of the Internet pages, which makes it a global text encoding of choice. Google uses version 5.2 of Unicode, which represents a wide range of characters from Egyptian Hieroglyphs, to most of living languages including Hebrew, Arabic, Chinese and Zulu.

ASCII, that once dominated the web is down to 20% and it is probably because of  pages that have not been updated in last several years.