Probably most boards you find where you live are shipped to the USA at first (at least that's how it works here, companies here buy from USA retailers).
So no, there's absolutely no incompatibility issues in getting yourself a board from US. :wink:
Motherboards come both in 20pin and 24pin power pin flavors, make sure it fits your power supply power connectors. If they don't just get an adapter, unless you plan on buying a new PSU (Power Supply Unit)