diff --git a/lib/gui/app/i18n.ts b/lib/gui/app/i18n.ts
index 78ec6225ee..5809a6fe33 100644
--- a/lib/gui/app/i18n.ts
+++ b/lib/gui/app/i18n.ts
@@ -39,4 +39,6 @@ i18next.use(initReactI18next).init({
 	},
 });
 
+export const supportedLocales = ['en', 'zh'];
+
 export default i18next;
diff --git a/lib/shared/catalina-sudo/sudo.ts b/lib/shared/catalina-sudo/sudo.ts
index 3653e50a91..b4f03abbd1 100644
--- a/lib/shared/catalina-sudo/sudo.ts
+++ b/lib/shared/catalina-sudo/sudo.ts
@@ -20,6 +20,7 @@ import { env } from 'process';
 import { promisify } from 'util';
 
 import { getAppPath } from '../utils';
+import { supportedLocales } from '../../gui/app/i18n';
 
 const execFileAsync = promisify(execFile);
 
@@ -32,6 +33,12 @@ export async function sudo(
 	try {
 		let lang = Intl.DateTimeFormat().resolvedOptions().locale;
 		lang = lang.substr(0, 2);
+		if (supportedLocales.indexOf(lang) > -1) {
+			// language should be present
+		} else {
+			// fallback to eng
+			lang = 'en';
+		}
 
 		const { stdout, stderr } = await execFileAsync(
 			'sudo',
@@ -43,7 +50,7 @@ export async function sudo(
 					SUDO_ASKPASS: join(
 						getAppPath(),
 						__dirname,
-						'sudo-askpass.osascript-' + lang + '.js',
+						`sudo-askpass.osascript-${lang}.js`,
 					),
 				},
 			},