English vs. British:
Here the world war spikes are obvious. Also interesting is the sustained rise from the postwar low. Quite a contrast with both British and English.
France and America are quite similar. France has huge spikes for the two world wars, and earlier for 1813-15
America has little spikes for the world wars, and possibly a high for Vietnam (1964-1975) though I could not tell you if it would pass statistical significance. (I thought that after Vietnam there would be a postwar low as for Germany. But apparently Vietnam was a tie.)