Last modified: 2012-09-03 04:23:26 UTC
Considering the number of languages, it i preferred to have a single "America" region that groups all languages instead of having multiple sub-regions ("NA","LA,"SA"). This makes the list sub-sections consistent with the labels on the top-right map (where a single "America" label appears).
Fix committed in https://gerrit.wikimedia.org/r/#/c/22293/ .