diff --git a/app/i18n/index.ts b/app/i18n/index.ts
index f780d69f30..dbe448c69c 100644
--- a/app/i18n/index.ts
+++ b/app/i18n/index.ts
@@ -9,6 +9,7 @@ import en from '@assets/i18n/en.json';
 import availableLanguages from './languages';
 
 const deviceLocale = getLocales()[0].languageTag;
+const PRIMARY_LOCALE = 'en';
 export const DEFAULT_LOCALE = getLocaleFromLanguage(deviceLocale);
 
 function loadTranslation(locale?: string) {
@@ -201,7 +202,7 @@ function loadChinesePolyfills() {
 
 export function getLocaleFromLanguage(lang: string) {
     const languageCode = lang.split('-')[0];
-    const locale = availableLanguages[lang] || languageCode;
+    const locale = availableLanguages[lang] || availableLanguages[languageCode] || PRIMARY_LOCALE;
     return locale;
 }