Guard lazy widget copy translations

server.js

@@ -1218,13 +1218,20 @@ async function translateWidgetCopyOnce(sourceCopy, sourceLanguage, targetLanguag
       throw new Error(openAiError.message);
     }
     const data = await response.json();
-    return normalizeWidgetCopyEntry(parseJsonBlock(outputTextFromResponse(data)), targetLanguage);
+    const translated = normalizeWidgetCopyEntry(parseJsonBlock(outputTextFromResponse(data)), targetLanguage);
+    if (widgetCopyLooksUntranslated(sourceCopy, translated)) return null;
+    return translated;
   } catch (error) {
     console.error("widget_copy_translation_failed", targetLanguage, error.message);
     return null;
   }
 }
 
+function widgetCopyLooksUntranslated(sourceCopy, translatedCopy) {
+  const importantFields = ["title", "intro", "offlineIntro", "placeholder", "sendLabel"];
+  return importantFields.every((field) => String(sourceCopy[field] || "").trim() === String(translatedCopy[field] || "").trim());
+}
+
 function parseJsonBlock(value) {
   const text = String(value || "").trim().replace(/^```(?:json)?/i, "").replace(/```$/, "").trim();
   return JSON.parse(text);