The character of Xena was inspired by Brigitte Lin's character from The Bride with White Hair (1993), and was meant to have a character arc lasting three episodes ending with her death. However producers looked ahead to a possible spin-off and decided to spare her. The three part arc on Hercules was so successful with viewers and ratings that studio execs gave the go-ahead for the Xena spin-off.
This is not my world... DISAPPOINTED!
Characters often measure distances in the metric system which was gradually developed in the Renaissance, perfected in the late 18th century, and made internationally popular only in the mid 20th century. It can be assumed that conversion to modern units is part of the "translation" we are hearing of what they said.
The end credits for each episode of both Hercules: The Legendary Journeys and Xena: Warrior Princess included an additional humourous message near the end of the credits. They were usually in the style of the "No animals were harmed..." messages featured in most end credits.