Right and left are called dexter and sinister in Latin, with the latter term coming to denote something evil in English. The English word "right" has many meanings, it can mean the direction or something which is correct, a positive connotation.
When did this start? How many languages have this pattern? Are there any examples of the opposite?
Hi! There's lots of room for discussion here, but just FYI, there was a comment from /u/itsallfolklore that you may find interesting