At the moment the i18n support is very limited. Date formats used in most of the world are missing, decimal separators, sort orders and such all seems to be en_US only. It would be helpful, at a minimum to add:
Additional date formats, including YYYY-MM-DD (which is probably the most common format in the world)
Support both “.” and “,” as decimal delimiter in input
Sorting of non en_US text correctly, for example with åäö.