diff --git a/app/appearance/langs/zh_CHT.json b/app/appearance/langs/zh_CHT.json
index 6902b06e3..55210fac0 100644
--- a/app/appearance/langs/zh_CHT.json
+++ b/app/appearance/langs/zh_CHT.json
@@ -880,6 +880,7 @@
     "119": "正在下載網絡圖片 [%s]",
     "120": "下載完畢，一共 [%d] 個文件",
     "122": "該功能需在思源桌面端進行配置",
+    "121": "該文檔中不存在網絡圖片",
     "123": "新增/選擇雲端同步目錄後才能啟用同步功能",
     "124": "請在 [設置 - 啟用雲端同步] 中開啟雲端同步",
     "125": "自動同步下載失敗次數過多，請嘗試手動觸發同步，如果還有問題請<a href=\"https://ld246.com/article/1649901726096\" target=\"_blank\">反饋</a>",
diff --git a/kernel/model/conf.go b/kernel/model/conf.go
index 324282ef4..1a308f250 100644
--- a/kernel/model/conf.go
+++ b/kernel/model/conf.go
@@ -480,8 +480,13 @@ func (conf *AppConf) GetClosedBoxes() (ret []*Box) {
 	return
 }
 
-func (conf *AppConf) Language(num int) string {
-	return langs[conf.Lang][num]
+func (conf *AppConf) Language(num int) (ret string) {
+	ret = langs[conf.Lang][num]
+	if "" != ret {
+		return
+	}
+	ret = langs["en_US"][num]
+	return
 }
 
 func InitBoxes() {