Count, As in most languages, there are many ways of expressing the same thought in Latin. The one I offered was just my stab at it and I certainly did not intend to give it an exclusive air of correctness or erudition. It might well be that a Classics lecturer at Cambridge would provide quite a different response...or even laugh my effort out of court! Still...thanks for the kind thought.
Knoddy, There are many variants. Sometimes the b-word ends in -us, sometimes -is, sometimes -i. Sometimes it was 'ne' and sometimes 'non' for the 'don't' part. Hardly surprising, as it wasn't real Latin, after all. The whole phrase started life as a military 'motto', I believe, and most soldiers' grasp of Latin was rudimentary at best! Cheers