I wrote a web-application to find Wikipedia articles geolocations on the OpenStreetMap www.ausleuchtung.ch/geo_wiki/.
After the click on the map, it shows Wikipedia articles geolocations in the radius of ten kilometers around the click. A Wikipedia language can be changed by replacing the language code "en" for English, to "fr" for French, "de" for German, etc.
I wrote it mostly for myself (and actually use it), but it works for the whole world and for all Wikipedia languages. The number of articles is limited by 100.