You know what is hilarious - I worked with a lady years ago who cursed in Portuguese - so all I know beyond "muito obrigado" are swear words. Similarly I know lots of Tagalog(Philippines) curses from working with Filipinos. But Russian, so rich in swear words - name another language that has degrees of the S word and the F word.
You don't even need to miss a day to screw it up. They've screwed my streaks up a number of times. I pay no attention to it now,