Love of country and willingness to sacrifice for it:
— British nationalism was in the air and patriotic sentiments ran high.

synonym: patriotism.

Dutch: burgerzin, chauvinisme, civisme, nationalisme, nationaliteitsgevoel, patriottisme, vaderlandsliefde
Polish: patriotyzm, miłość do ojczyzny

The doctrine that your national culture and interests are superior to any other.

Dutch: nationalisme
Polish: nacjonalizm

The aspiration for national independence felt by people under foreign domination.

The doctrine that nations should act independently (rather than collectively) to attain their goals.