Once upon a time there was an awesome maps company called Mapzen <https://mapzen.com/>. All of their software was open source and all their data sets were licensed under a free license. Sadly they are shutting down <https://mapzen.com/blog/shutdown/>. One of their projects was Who's on First <https://www.whosonfirst.org/> which is a gazetteer <https://en.wikipedia.org/wiki/Gazetteer> of places. The data is a huge collection <https://github.com/whosonfirst-data/whosonfirst-data> of geojson files hosted on github. The place files include a concordance of ids in other systems... including Wikidata. :) Mapzen used the data in Wikidata in their Places API <https://mapzen.com/documentation/places/> (source code <https://github.com/whosonfirst/whosonfirst-www>) to translate place names. I'm not sure if we would have any interest in using/importing this data in Wikidata, but I thought I'd make more people aware of an awesome free license data set that needs some help now that Mapzen is going away. Thanks for everything you do! David Barratt