Changing to States and bulk editing locations

Is there a way to replace the text “Region” with “State” in the Add Listing sequence? People in the US get confused and try to input their counties or other unnecessary information instead of the State.

Also, I imported all of my data with the State codes (WA, CA, MI, etc.) instead of the State names, but the plugin only wants to create locations with the full name of the States. Is there some way to bulk edit the ~5,000 locations that I already have to change them from the codes to the full names?