Hi,
yes, it's a request often written and it's right. There are problems with all the flags to prevent in the database but we have currently already all the countries, heights and continents. We have just to include all the flags and to manage a php page to organize the presentation of the climbs in zone 12 quite differently than the others because there are more informations to show.
Thanks for your remark : be sure that we'll think about it soon !