The Latin on British Coins

Paraglider returns to Doha next week. Meanwhile, I wonder how many tourists to Britain ever notice the cryptic messages that surround the Queen's head on our coinage? Apart from the coherent Elizabeth II and the date, our pounds bear the legend DG REG FD. Not very informative. The two pound coins, having more space available, expand this to DEI GRA REG FID DEF, which is better, but still a bit