If you see the FAQ on the site he mentions you can contact him if you're interested in doing translation. You can also volunteer for his web app which is open

If you see the FAQ on the site he mentions you can contact him if you're interested in doing translation. You can also volunteer for his web app which is open source so he can spend less time on the website and more time making videos: http://code.google.com/p/khanacademy/ http://code.google.com/p/khanacademy/