Cool game, and nicely presented! I got a 250, then 400.
It might be good to ask the user where they are from (non-intrusively of course, maybe a simple country selector or IP lookup) to get another dimension on the statistics. Or what languages they already know as well might be interesting when looking at the results.
I'm recording GeoIP country and the Accept-Languages header from their request. Hopefully this generates some interesting data to pore over later. Monthly data snapshots might be useful for researchers.
It might be good to ask the user where they are from (non-intrusively of course, maybe a simple country selector or IP lookup) to get another dimension on the statistics. Or what languages they already know as well might be interesting when looking at the results.