Why do you think it is weird? I think it's great it is increasing again now. I learnt a little bit 50 years ago as a child and was always sad that it was declining in use as I grew older. So glad it's growing so fast now. It is a fantastic idea - my Grandfather used to tell me of how often it was used between allies of different nationalities during the war, both on the battle field, and in prisoner of war camps, and after the fighting had finished, managing the truce. It undoubtably saved many lives