Comment 2 for bug 686553

It's fairly likely that people will rate software differently in different languages, particularly if the software is poorly localized.

It's possible that people will rate the same version of the same software differently on different OS versions, e.g. if the software relies on a library that's crashier in a newer OS version.

Initially, though, I think we will have so few reviews that we should divide them the minimum necessary for fairness. So the median rating should be based on what version of the item you're using, not on what language you're using or what OS version you're using.