diff --git a/plugin-designs/my-upg-100-list/upg-100-list.vue b/plugin-designs/my-upg-100-list/upg-100-list.vue
index 2a67feafc..88b004cc1 100644
--- a/plugin-designs/my-upg-100-list/upg-100-list.vue
+++ b/plugin-designs/my-upg-100-list/upg-100-list.vue
@@ -414,7 +414,12 @@ const API_BASE = (typeof window !== 'undefined' && window.MAP_APP_API_URL)
 // so the dialog opens in this tab rather than a popup a browser may block. The
 // packet's locale follows the app's, so a reader gets it in their own language.
 const { locale: packetLocale, t } = useI18n()
-status.value = t('legend.loadingData')
+// The first status a reader sees. Set in a watcher, not once at setup, so a language switch while the
+// map is still loading re-resolves it; the first real status replaces it and the watcher then leaves it.
+let loadingText = ''
+watch(packetLocale, () => {
+  if (status.value === '' || status.value === loadingText) status.value = loadingText = t('legend.loadingData')
+}, { immediate: true })
 
 // ★ THE LEGEND SPEAKS THE READER'S LANGUAGE. Its rows were clusters.json's English labels and its
 // section rows the English grouping keys, while the packet printed from the same row was localized