diff --git a/src/i18n/locales/zh/dataLoading.json b/src/i18n/locales/zh/dataLoading.json
index 4eab6fcf..6ffe595d 100644
--- a/src/i18n/locales/zh/dataLoading.json
+++ b/src/i18n/locales/zh/dataLoading.json
@@ -39,6 +39,7 @@
       "rowLimit": "行数限制",
       "loadSelected": "加载选中的表",
       "loadedCount": "✓ 已加载 {{count}} 张表",
+      "loadedCount_plural": "✓ 已加载 {{count}} 张表",
       "preview": "预览",
       "hidePreview": "收起",
       "previewing": "正在预览...",
diff --git a/tests/frontend/unit/app/i18nLocales.test.ts b/tests/frontend/unit/app/i18nLocales.test.ts
new file mode 100644
index 00000000..dd6c9933
--- /dev/null
+++ b/tests/frontend/unit/app/i18nLocales.test.ts
@@ -0,0 +1,30 @@
+import { describe, expect, it } from "vitest";
+
+import en from "../../../../src/i18n/locales/en";
+import zh from "../../../../src/i18n/locales/zh";
+
+type TranslationValue = string | Record<string, TranslationValue>;
+type TranslationMap = Record<string, TranslationValue>;
+
+function collectKeys(value: TranslationMap, prefix = ""): Set<string> {
+  const keys = new Set<string>();
+
+  for (const [key, child] of Object.entries(value)) {
+    const nextPrefix = prefix ? `${prefix}.${key}` : key;
+    if (typeof child === "string") {
+      keys.add(nextPrefix);
+    } else {
+      for (const childKey of collectKeys(child, nextPrefix)) {
+        keys.add(childKey);
+      }
+    }
+  }
+
+  return keys;
+}
+
+describe("i18n locale bundles", () => {
+  it("keeps Simplified Chinese translation keys aligned with English", () => {
+    expect(collectKeys(zh)).toEqual(collectKeys(en));
+  });
+});