I made this list for my pleasure, so I do not warrant an absolute accuracy. If you notice errors or have some suggestions, email me. Later I found Mark Rosenfelder's page containing numbers for more than 4500 languages, at http://www.zompist.com/numbers.shtml! However, here the same task is done in a somewhat different manner. I am attempting to use the writing system which is officially (as far as I know) used for a particular language. You can also read the description how I generated images for each language.
Indoeuropean languages: