Ruby (https://github.com/replit/emscripted-ruby https://github.com/replit/emscripted-ruby) and python (https://github.com/replit/empythoned https://github.com/r

Ruby (https://github.com/replit/emscripted-ruby https://github.com/replit/emscripted-ruby) and python (https://github.com/replit/empythoned https://github.com/replit/empythoned) are built using emscripten (https://github.com/kripken/emscripten/wiki https://github.com/kripken/emscripten/wiki) I would imagine that other languages like C could be brought in if they could be compiled using emscripten. However, people have had problems bringing clang and llvm into emscripten: https://github.com/kripken/emscripten/issues/579 https://github.com/kripken/emscripten/issues/579