Since Letterboxd's June 20th update, we can now sort films by their ratings in each separate country. Out of the 247 countries recognized by Letterboxd, 31 of them have enough users on the website to show a differentiated ranking.
They are:
12 Angry Men - Argentina, Austria, Belgium, Brazil, Chile, Colombia, Denmark, Finland, Germany, Greece, India, Indonesia, Italy, Netherlands, Norway, The Philippines, Poland, Portugal, Russia, Saudi Arabia, Spain, Sweden, Turkey, and New Zealand
Harakiri - Canada, Australia, Mexico, Ireland, and United States
The Human Condition III: A Soldier’s Prayer - France and United Kingdom
These are all the narrative films considered the best in each of these countries. Details on the notes.