From e4ce6688508f9cc9326a2a586866361bed85ce83 Mon Sep 17 00:00:00 2001
From: undefined <i@undefined.moe>
Date: Wed, 29 Jun 2022 00:31:44 +0800
Subject: [PATCH] core: bug fix

---
 packages/hydrooj/src/lib/i18n.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/hydrooj/src/lib/i18n.ts b/packages/hydrooj/src/lib/i18n.ts
index 00ef4d3ca..022a9d614 100644
--- a/packages/hydrooj/src/lib/i18n.ts
+++ b/packages/hydrooj/src/lib/i18n.ts
@@ -7,7 +7,7 @@ declare global {
 }
 
 String.prototype.translate = function translate(...languages: string[]) {
-    if (languages[0].startsWith('en')) {
+    if (languages[0]?.startsWith('en')) {
         // For most use cases, source text equals to translated text in English.
         // So if it doesn't exist, we should use the original text instead of fallback.
         return locales[languages[0]]?.[this] || locales['en']?.[this] || this;