feat: add multilingual interface support

2026-07-24 16:00:12 +01:00
parent d2567c59ce
commit 16383c2a3f
10 changed files with 788 additions and 84 deletions
@@ -70,3 +70,15 @@ base map are changed. An open parcel or building information dialog is included
 too. Copy the URL to share that exact state; opening it restores the same map
 view and selected feature. Invalid or incomplete map parameters fall back to
 the normal default view.
+
+## Translations
+
+The interface selects English, Spanish, or Portuguese from the browser
+preference on the first visit and remembers subsequent changes made in
+Settings. Unsupported languages and missing messages fall back to English.
+
+To add another language:
+
+1. Add a dictionary with the same keys to `TRANSLATIONS` in `i18n.js`.
+2. Translate every value, including accessibility labels and status messages.
+3. Run `npm test` to verify that the dictionary is complete.