+## i18n
+
+If you make a change that involve the locale files (in `config/locales`) then please
+only submit changes to the `en.yml` file. The other files are updated via
+[Translatewiki](https://translatewiki.net/wiki/Translating:OpenStreetMap) and should
+not be included in your pull request.
+
+### Nominatim prefixes
+
+I18n keys under the `geocoder.search_osm_nominatim` keyspace are managed by the
+Nominatim maintainers. From time to time they run stats over the Nominatim
+database, and update the list of available keys manually.
+
+Adding or removing keys to this list is therefore discouraged, but contributions
+to the descriptive texts are welcome.
+