* It abbreviates "US" in "US Citizen" but not "United States". I would expect both "United States Citizen" and "US" (country) to work too. It uses "British Citizen" vs. "United Kingdom". Both "United Kingdom Citizen" and "Britain" should work too.
* Using ISO 3166 country codes in the URLs would make them shorter.
* It abbreviates "US" in "US Citizen" but not "United States". I would expect both "United States Citizen" and "US" (country) to work too. It uses "British Citizen" vs. "United Kingdom". Both "United Kingdom Citizen" and "Britain" should work too.
* Using ISO 3166 country codes in the URLs would make them shorter.