Geocoding is complicated

This is a copy of an issue that I just created in the Nominatim repository. Sadly my skills in Python (and my knowledge of the OSM data model) aren’t good enough to poke around in the code on my own to figure out what is happening. Reverse Geocoding in the Ho Chi Minh City center return wrong city What did you search for? https://nominatim.openstreetmap.org/reverse?format=geojson&lat=10.7686020&lon=106.6900885 What result did you get? The address field in the JSON response returns Thủ Đức as city: { "address": { "amenity": "Little HaNoi Egg Coffee", "house_number": "212", "road": "Le Lai Street", "neighbourhood": "Khu phố 3", "suburb": "Ben Thanh", "city": "Thủ Đức", "ISO3166-2-lvl4": "VN-SG", "postcode": "70200", "country": "Vietnam", "country_code": "vn" } } This is a bit complicated as Thủ Đức currently exists twice in OSM: once as a (former) subdivision of HCMC and now a navigation marker: https://www.openstreetmap.org/node/12925776412 (Which used to be a city) and as a suburb:…