In the Star Wars franchise, they can travel through hyperspace to other systems and planets. But Han in Star Wars: A New Hope said they needed to make the jump to lightspeed. And there have been several other instances where a similar phrase was used and they would say "...jump to lightspeed" or "...make it to lightspeed"
Now, this doesn't make sense as they are obviously traveling to locations multiple light-years away. And if they want to make it to their destination in less than 50 or so years, they have to be going faster than the speed of light. I mean, the Millennium Falcon is even said to be able to go ".5 past light speed" according to Han.
I am aware that they don't always say "lightspeed" but sometimes are known to have said "... jump to hyperspace" but why do they say "lightspeed" at all?
I am looking for specific examples of the term "lightspeed" being explained. And why it is said.