diff --git a/frontend/src/utils/util.ts b/frontend/src/utils/util.ts
index 44f6cb7cbb11..3eaf567cefff 100644
--- a/frontend/src/utils/util.ts
+++ b/frontend/src/utils/util.ts
@@ -686,10 +686,20 @@ export function getLanguage() {
     return localStorage.getItem('lang') || 'zh';
 }
 
+function normalizeAppLocaleKey(language: string) {
+    const localeMap: Record<string, string> = {
+        tw: 'zh-hant',
+        'zh-Hant': 'zh-hant',
+        'pt-BR': 'pt-br',
+        'es-ES': 'es-es',
+    };
+    return localeMap[language] || language.toLowerCase();
+}
+
 export function getLabel(row: any) {
     const language = localStorage.getItem('lang') || 'zh';
-    let lang = language == 'tw' ? 'zh-Hant' : language;
-    if (row.label && row.label[lang] != '') {
+    const lang = normalizeAppLocaleKey(language);
+    if (row.label && typeof row.label[lang] === 'string' && row.label[lang] !== '') {
         return row.label[lang];
     }
     if (language == 'zh' || language == 'tw') {
@@ -701,8 +711,8 @@ export function getLabel(row: any) {
 
 export function getDescription(row: any) {
     const language = localStorage.getItem('lang') || 'zh';
-    let lang = language == 'tw' ? 'zh-Hant' : language;
-    if (row.description && row.description[lang] != '') {
+    const lang = normalizeAppLocaleKey(language);
+    if (row.description && typeof row.description[lang] === 'string' && row.description[lang] !== '') {
         return row.description[lang];
     }
     return '';