It's ok you can edit from the worldbuilder. I just did'nt know the program. I want to leave this first mod without messing with the xml. We can look into that for the next one. One step at a time, and we have plenty of time.
When I did that in the WB, I ended up with the renamed city on the map, but in the diplomacy screen and everywhere else, the city state was always named as vanilla. So if I renamed Oslo into Lorraine, I'd still end up with Lorraine as a city on the map, but whenever I conducted diplomacy with them, they'd show up as Oslo.
This was seriously confusing with many city states. I really recommend an XML-update when changing city states; it's easy enough to do too.
<Update>
<Set Description="Wales" ShortDescription="Wales" Adjective="Wales" />
<Where Type="MINOR_CIV_EDINBURGH" />
</Update>
Here's the xml for changing the City State names all over. This will change Edinburgh into Wales. I use this for all my City States in my Hundred Years' War mod.
PHP:<Update> <Set Description="Wales" ShortDescription="Wales" Adjective="Wales" /> <Where Type="MINOR_CIV_EDINBURGH" /> </Update>
Here's the xml for changing the City State names all over. This will change Edinburgh into Wales. I use this for all my City States in my Hundred Years' War mod.
PHP:<Update> <Set Description="Wales" ShortDescription="Wales" Adjective="Wales" /> <Where Type="MINOR_CIV_EDINBURGH" /> </Update>
This is just an update. This means that you can add it into a completely new xml-file in your project. As you continue to rename city states, you just then edit that file and copy and paste further of these entires below the first one.
It's really simple. Just don't forget the UpdateDatabase operation in the Properties. That's my most common mistake.