Some updates:
@Renato kindly fixed an issue on Category settings:
https://github.com/merefield/discourse-locations/pull/144
We had a contribution for the Russian language, thank you!
https://github.com/merefield/discourse-locations/pull/143
And finally I added an experimental new Topic List filter called Nearby:
https://github.com/merefield/discourse-locations/pull/142
Which lists all the Topics within x km (setting) from the logged in user’s supplied location.
@Barney_Lodge that was inspired by your use case and took up most of my Sunday 
This also fixes the inline location selector for Topics on the modal.