Before the Web became ubiquitous, it was difficult to promote a new programming language. The most popular ones were either pushed by a manufacturer (such as Fortran, originally developed by IBM in the 1950s) or spread fortuitously through word-of-mouth (C, C++).
The internet changed all that. Now anyone can not only publish their own language (complete with compiler or interpreter); they can promote it through a variety of forums and code repositories. Ruby, Python, and PHP all spread thanks to the Web.