diff --git a/packages/back-nest/src/seeder/commands/challenge.seeder.ts b/packages/back-nest/src/seeder/commands/challenge.seeder.ts
index d665936..575ca7f 100644
--- a/packages/back-nest/src/seeder/commands/challenge.seeder.ts
+++ b/packages/back-nest/src/seeder/commands/challenge.seeder.ts
@@ -93,6 +93,26 @@ export class ProjectSeedRunner extends CommandRunner {
       '}';
     thirdChallenge.project = project;
 
+    const fourthChallenge = new Challenge();
+    challenges.push(fourthChallenge);
+    fourthChallenge.id = '6be1759b-a6ed-445e-aeef-dad6d7083e45';
+    fourthChallenge.sha = '097f875bcfe0dd3703f5b3fd6837cc0bdbc2ccb8';
+    fourthChallenge.treeSha = 'ac219cef2ad7999fc95c8fd4eb3b945ba37abd43';
+    fourthChallenge.path = 'zookeeper-server/src/main/java/org/apache/zookeeper/server/persistence/SnapshotInfo.java';
+    fourthChallenge.language = 'java';
+    fourthChallenge.url =
+      'https://github.com/apache/zookeeper/blob/ac219cef2ad7999fc95c8fd4eb3b945ba37abd43/zookeeper-server/src/main/java/org/apache/zookeeper/server/persistence/SnapshotInfo.java/#L25-L35';
+    fourthChallenge.content =
+      'public class SnapshotInfo {\n' +
+      '\tpublic long zxid;\n' +
+      '\tpublic long timestamp;\n' +
+      '\tSnapshotInfo(long zxid, long timestamp) {\n' +
+      '\t\tthis.zxid = zxid;\n' +
+      '\t\tthis.timestamp = timestamp;\n' +
+      '\t}\n' +
+      '}';
+    fourthChallenge.project = project;
+
     return challenges;
   }
 }
diff --git a/packages/webapp-next/modules/play2/components/RaceSettings.tsx b/packages/webapp-next/modules/play2/components/RaceSettings.tsx
index 5a03571..96ed08c 100755
--- a/packages/webapp-next/modules/play2/components/RaceSettings.tsx
+++ b/packages/webapp-next/modules/play2/components/RaceSettings.tsx
@@ -15,8 +15,15 @@ import { LanguageSelector } from "./race-settings/LanguageSelector";
 
 export const RaceSettings: React.FC = () => {
   const isOpen = useSettingsStore((s) => s.languageModalIsOpen);
-  const languageSelected = useSettingsStore((s) => s.languageSelected);
-  const language = languageSelected ? languageSelected.name : "language";
+  const languagesSelected = useSettingsStore((s) => s.languageSelected);
+  let language = "language";
+  if (languagesSelected.length > 0) {
+    if (languagesSelected.length === 1) {
+      language = languagesSelected[0].name;
+    } else {
+      language = `${languagesSelected.length} selected`;
+    }
+  }
 
   return (
     <>
diff --git a/packages/webapp-next/modules/play2/components/race-settings/LanguageSelector.tsx b/packages/webapp-next/modules/play2/components/race-settings/LanguageSelector.tsx
index d7475da..26b1d93 100644
--- a/packages/webapp-next/modules/play2/components/race-settings/LanguageSelector.tsx
+++ b/packages/webapp-next/modules/play2/components/race-settings/LanguageSelector.tsx
@@ -5,9 +5,9 @@ import { getExperimentalServerUrl } from "../../../../common/utils/getServerUrl"
 import { useSettingsStore, LanguageDTO, setLanguage } from "../../state/settings-store";
 import { useGameStore } from "../../state/game-store";
 
-const selectProgrammingLanguage = (languageSelected: LanguageDTO | null) => {
-  setLanguage(languageSelected);
-  if (languageSelected) {
+const selectProgrammingLanguages = (languagesSelected: LanguageDTO[]) => {
+  setLanguage(languagesSelected);
+  if (languagesSelected.length > 0) {
     useGameStore.getState().game?.next();
   }
 };
@@ -19,16 +19,27 @@ export function LanguageSelector() {
     fetch(...args).then((res) => res.json())
   );
   const languages = data as undefined | { language: string; name: string }[];
-  const selectedLanguage = useSettingsStore((s) => s.languageSelected);
+  const selectedLanguages = useSettingsStore((s) => s.languageSelected);
+
+  const isSelected = (language: LanguageDTO) => {
+    return selectedLanguages.some((l) => l.language === language.language);
+  };
+
+  const displayValue = () => {
+    if (selectedLanguages.length === 0) return "nothing selected";
+    if (selectedLanguages.length === 1) return selectedLanguages[0].name;
+    return `${selectedLanguages.length} selected`;
+  }
+
   return (
     <div className="w-full text-dark-ocean font-thin w-[250px]">
       <h2 className="text-xs mb-1 font-semibold uppercase tracking-widest">
         select language
       </h2>
-      <Listbox value={selectedLanguage} onChange={selectProgrammingLanguage}>
+      <Listbox value={selectedLanguages} onChange={selectProgrammingLanguages} multiple>
         <div className="flex items-center">
           <Listbox.Button className="flex items-center justify-between px-2 bg-gray-200 p-1 w-full rounded">
-            {selectedLanguage?.name || "nothing selected"}
+            {displayValue()}
             <svg
               xmlns="http://www.w3.org/2000/svg"
               viewBox="0 0 20 20"
@@ -43,9 +54,9 @@ export function LanguageSelector() {
               ></path>
             </svg>
           </Listbox.Button>
-          {selectedLanguage && (
+          {selectedLanguages.length > 0 && (
             <button
-              onClick={() => selectProgrammingLanguage(null)}
+              onClick={() => selectProgrammingLanguages([])}
               className="flex items-center p-1 h-full  bg-gray-200 ml-2 rounded"
             >
               <div className="w-2 text-red-500 fill-current mx-1">
@@ -59,7 +70,8 @@ export function LanguageSelector() {
           <Listbox.Options static>
             {languages?.map((language) => (
               <Listbox.Option key={language.name} value={language}>
-                {({ active, selected }) => {
+                {({ active }) => {
+                  const selected = isSelected(language);
                   return (
                     <li
                       className={`pl-2 flex items-center gap-2 my-1 p-1 rounded cursor-pointer ${
diff --git a/packages/webapp-next/modules/play2/services/Game.ts b/packages/webapp-next/modules/play2/services/Game.ts
index 6e9e52c..b9a5855 100644
--- a/packages/webapp-next/modules/play2/services/Game.ts
+++ b/packages/webapp-next/modules/play2/services/Game.ts
@@ -65,7 +65,10 @@ export class Game {
     const connectedToValidRace =
       useConnectionStore.getState().raceExistsInServer;
     if (connectedToValidRace) {
-      const language = useSettingsStore.getState().languageSelected?.language;
+      const languages = useSettingsStore.getState().languageSelected;
+      const language = languages.length > 0
+        ? languages[Math.floor(Math.random() * languages.length)].language
+        : undefined;
       const dto = { language };
       this.socket.emit("refresh_challenge", dto);
     } else {
@@ -79,7 +82,10 @@ export class Game {
 
   play() {
     const isPublic = useSettingsStore.getState().defaultIsPublic;
-    const language = useSettingsStore.getState().languageSelected?.language;
+    const languages = useSettingsStore.getState().languageSelected;
+    const language = languages.length > 0
+      ? languages[Math.floor(Math.random() * languages.length)].language
+      : undefined;
     const dto = { language, isPublic };
     this.socket.emit("play", dto);
   }
diff --git a/packages/webapp-next/modules/play2/state/settings-store.ts b/packages/webapp-next/modules/play2/state/settings-store.ts
index cfabb0c..39382db 100644
--- a/packages/webapp-next/modules/play2/state/settings-store.ts
+++ b/packages/webapp-next/modules/play2/state/settings-store.ts
@@ -13,7 +13,7 @@ export interface SettingsState {
   profileModalIsOpen: boolean;
   projectModalIsOpen: boolean;
   publicRacesModalIsOpen: boolean;
-  languageSelected: LanguageDTO | null;
+  languageSelected: LanguageDTO[];
   smoothCaret: boolean;
   syntaxHighlighting: boolean;
   raceIsPublic: boolean;
@@ -43,19 +43,24 @@ function getInitialToggleStateFromLocalStorage(
   return defaultToggleValue;
 }
 
-function getInitialLanguageFromLocalStorage(key: string): LanguageDTO | null {
+function getInitialLanguageFromLocalStorage(key: string): LanguageDTO[] {
   if (typeof document !== "undefined" && window) {
     let languageStr = localStorage.getItem(key) ?? "";
     let lang;
     try {
       lang = JSON.parse(languageStr);
-    } catch (e) {}
-    if (!lang?.language || !lang?.name) {
-      return null;
+    } catch (e) { }
+
+    // this is to migrate from the old single language format
+    if (lang && !Array.isArray(lang) && lang.language && lang.name) {
+      return [lang];
+    }
+
+    if (Array.isArray(lang)) {
+      return lang;
     }
-    return lang;
   }
-  return null;
+  return [];
 }
 
 export const useSettingsStore = create<SettingsState>((_set, _get) => ({
@@ -84,15 +89,15 @@ export const setCaretType = (caretType: "smooth" | "block") => {
   useSettingsStore.setState((state) => ({ ...state, smoothCaret }));
 };
 
-export const setLanguage = (language: LanguageDTO | null) => {
-  let stored = "";
-  if (language) {
-    stored = JSON.stringify(language);
+export const setLanguage = (languages: LanguageDTO[]) => {
+  let stored = "[]";
+  if (languages) {
+    stored = JSON.stringify(languages);
   }
   localStorage.setItem(LANGUAGE_KEY, stored);
   useSettingsStore.setState((state) => ({
     ...state,
-    languageSelected: language,
+    languageSelected: languages,
   }));
 };