Have you considered creating a github repo with a folder for each country, and then let the community add country-specific stuff in some simple yaml/json file?

Have you considered creating a github repo with a folder for each country, and then let the community add country-specific stuff in some simple yaml/json file? Each country can have it's own maintainer that verifies the data is correct and up to date. You'd then be able to source this data back into the app.