Removed invalid code in getLanguageFileDescription,When the language is not discovered, it will use the built-in language fallback mechanism to fall back,At the same time, we also fix the issue that using language in the server does not save the settings of the server side locale

src/main/resources/languages/zh-CN.json

@@ -191,6 +191,7 @@
     "language": {
       "current_language": "当前语言是: %s",
       "language_changed": "语言切换至: %s",
+      "language_not_found": "目前服务端没有这种语言: %s",
       "description": "显示或切换当前语言。"
     },
     "list": {