In India, the Kannada community has been the most active by far adding over 32,000 feature lablels and have even created an interactive map of the world [3] which is the first of its kind for any Indic language. Hindi is a distant second with over 2,000 feature names.

If you are interested to view maps in your language try out the multilingual map tool  [4]. You can also make quick maps using existing OSM data using Overpass [5] and export the data.

Localized maps like this are still largely experimental and need a lot of work. It would be great to see more Wikimedians involved in leveraging this open map data for local Wiki projects. One can contribute to the map by editing http://osm.org

Hit me up if anyone would like help with OpenStreetMap. i have been mapping for over 8 years now and know the ecosystem fairly well.

[1] http://www.openstreetmap.org/user/ramyaragupathy/diary/37569

[2] https://maps.wikimedia.org