I have a google maps scraper that I built for me a while ago (costs $1.5/1k queries) that solves that problem for you. You can search by city/zipcode etc, everything is mapped to a location code that you use when you make the call. So you can basically go to the location codes list, filter by Country to France, get all the location codes for all the cities, put them in a column in Clay and hit run. Let me know if you want to try it .