diff --git a/web/template/syzoj/submitpage.php b/web/template/syzoj/submitpage.php
index 7c40b40..b4da3d0 100644
--- a/web/template/syzoj/submitpage.php
+++ b/web/template/syzoj/submitpage.php
@@ -366,9 +366,41 @@ function resume(){
 		window.setTimeout("resume();",1000);
 	}
 }
+var languageNames=<?php echo json_encode($language_name, JSON_UNESCAPED_UNICODE); ?>;
+var aceModesByLanguageName={
+    "C":"c_cpp",
+    "C++":"c_cpp",
+    "Pascal":"pascal",
+    "Java":"java",
+    "Ruby":"ruby",
+    "Bash":"sh",
+    "Python":"python",
+    "PHP":"php",
+    "Perl":"perl",
+    "C#":"csharp",
+    "Obj-C":"objectivec",
+    "FreeBasic":"vbscript",
+    "Scheme":"scheme",
+    "Clang":"c_cpp",
+    "Clang++":"c_cpp",
+    "Lua":"lua",
+    "JavaScript":"javascript",
+    "Go":"golang",
+    "SQL":"sql",
+    "Fortran":"fortran",
+    "Matlab":"matlab",
+    "Cobol":"cobol",
+    "R":"r",
+    "Scratch3":"plain_text",
+    "UnknownLanguage":"plain_text"
+};
+function getAceModeName(lang){
+    var langIndex=parseInt(lang,10);
+    var languageName=languageNames[langIndex]||"";
+    return aceModesByLanguageName[languageName]||"plain_text";
+}
 function switchLang(lang){
-   var langnames=new Array("c_cpp","c_cpp","pascal","java","ruby","sh","python","php","perl","csharp","objectivec","vbscript","scheme","c_cpp","c_cpp","lua","javascript","golang","sql","fortran","matlab","cobol","r");
-   editor.getSession().setMode("ace/mode/"+langnames[lang]);
+    editor.getSession().setMode("ace/mode/"+getAceModeName(lang));
 
 }
 function reloadtemplate(lang){