What does Joshua 20:9 mean?

These cities were set aside for all the Israelites and for any foreigners living among them. Anyone who killed someone by accident could run there and not be killed by the victim’s family until they had a fair trial in front of the community. Joshua 20:9 - Modern Text Bible

(These safe cities are for everyone, not just Israelites. The goal is to make sure no one is punished unfairly, and everyone gets a fair hearing.)