Do you know such a plugin for a site by city?

Question

Geolocation

Hello, I got the idea to create a site that adapts to cities, I really liked this solution:
https://ecopolisrf.ru/
Here are the creators of this site, they also do this for cities
https://b2b-creative.ru/

In the code, one file I saw the plugin
/wp-content/plugins/multycity/
But it's unrealistic to google by the name of the folder, the search returns only multisites

. What is the peculiarity of such a solution. Geolocation - this is clearly defined by the city, but then not only does the text change depending on the city, the URL of the pages https://ecopolisrf.ru/ekaterinburg/ and internal pages also
https://ecopolisrf.ru/ekaterinburg/proektnye-reshe.. .At the same time, I looked at the ID - the page is the same (there are no heaps of pages for each city), only the text and URL change in the place where the city is. Maybe someone knows what kind of plugin this is or how to implement something similar?