diff --git a/packages/ui-next/index.ts b/packages/ui-next/index.ts
index 2f2dc72a0..40bfc7279 100644
--- a/packages/ui-next/index.ts
+++ b/packages/ui-next/index.ts
@@ -3,10 +3,10 @@ import path from 'path';
 import esbuild from 'esbuild';
 import c2k from 'koa2-connect/ts';
 import { createServer, type Plugin } from 'vite';
-import { serializer } from '@hydrooj/framework';
+import { HandlerCommon, serializer } from '@hydrooj/framework';
 import {
     Context, Handler, Logger,
-    NotFoundError, param, sha1, size, Types,
+    NotFoundError, param, SettingModel, sha1, size, Types,
 } from 'hydrooj';
 
 const logger = new Logger('ui-next');
@@ -112,6 +112,50 @@ function addFile(name: string, content: string) {
     hashes[name] = sha1(content).substring(0, 8);
 }
 
+async function buildI18n() {
+    const localeList: Record<string, { name: string, flag: string }> = {};
+    for (const lang in global.Hydro.locales) {
+        if (!/^[a-zA-Z_]+$/.test(lang)) continue;
+        if (!global.Hydro.locales[lang].__interface) continue;
+        addFile(`lang-${lang}.js`, `window.HydroLocale=${JSON.stringify(global.Hydro.locales[lang][Symbol.for('iterate')])};`);
+        const id = global.Hydro.locales[lang].__id;
+        if (id) localeList[id] = { name: global.Hydro.locales[lang].__langname, flag: global.Hydro.locales[lang].__flag };
+    }
+    addFile('locale-list.js', `window.HydroLocaleList=${JSON.stringify(localeList)};`);
+}
+
+async function buildCodeLangs() {
+    addFile('code-langs.js', `window.HydroCodeLangs=${JSON.stringify(SettingModel.langs)};`);
+}
+
+async function buildVersions() {
+    const versions: Record<string, string> = { ...global.Hydro.version };
+    try {
+        const { simpleGit } = require('simple-git') as typeof import('simple-git');
+        const fetchAddonVersion = async (name: string, addonPath: string) => {
+            try {
+                const git = simpleGit(addonPath);
+                const [log, status] = await Promise.all([git.log(), git.status()]);
+                if (log.all.length > 0) {
+                    let hash = log.all[0].hash.substring(0, 7);
+                    if (!status.isClean()) hash += '-dirty';
+                    versions[name] = versions[name] ? `${versions[name]}-${hash}` : hash;
+                }
+            } catch (e) {
+                logger.debug('Could not get git hash for addon %s: %o', name, e);
+            }
+        };
+        await Promise.all(
+            Object.entries(global.addons)
+                .filter(([name]) => name !== 'hydrooj') // already handled in loader.ts
+                .map(([name, addonPath]) => fetchAddonVersion(name, addonPath as string)),
+        );
+    } catch (e) {
+        logger.debug('simple-git not available: %o', e);
+    }
+    addFile('versions.js', `window.HydroVersions=${JSON.stringify(versions)};`);
+}
+
 class UiNextConstantHandler extends Handler {
     noCheckPermView = true;
 
@@ -219,10 +263,32 @@ export async function buildPlugins() {
     }
 }
 
+const HASH_FALLBACK = '00000000';
+
+const getViewLang = (handler: HandlerCommon) => handler.user?.viewLang || handler.session?.viewLang || 'zh';
+
+const injectedScripts = (resolve: (name: string) => string, viewLang: string) => [
+    'code-langs.js',
+    'locale-list.js',
+    `lang-${viewLang}.js`,
+    'versions.js',
+].map((name) => `<script src="${resolve(name)}"></script>`);
+
 export async function apply(ctx: Context) {
     if (process.env.HYDRO_CLI) return;
 
+    ctx.Route('ui_next_constants', '/plugins/:version/:name', UiNextConstantHandler);
+
     if (process.env.DEV) {
+        ctx.on('app/started', async () => {
+            await buildI18n();
+            await buildCodeLangs();
+            await buildVersions();
+        });
+        ctx.on('app/i18n/update', buildI18n);
+        ctx.on('system/setting-loaded', buildCodeLangs);
+        ctx.on('system/setting', buildCodeLangs);
+
         const vite = await createServer({
             root: __dirname,
             clearScreen: false,
@@ -265,7 +331,13 @@ export async function apply(ctx: Context) {
                     route_map: ctx.server.routeMap,
                     endpoint: ctx.setting.get('server.url') || undefined,
                 }, serializer(false, context.handler));
-                const htmlToRender = html.replace(INJECT_MARKER, buildInject(serialized));
+                const ts = Date.now();
+                const devAssetUrl = (name: string) => `/plugins/0/${name}?_=${ts}`;
+                const injectHtml = [
+                    buildInject(serialized),
+                    ...injectedScripts(devAssetUrl, getViewLang(context.handler)),
+                ].join('\n');
+                const htmlToRender = html.replace(INJECT_MARKER, injectHtml);
                 return await vite.transformIndexHtml(context.handler.context.req.url!, htmlToRender);
             },
         });
@@ -275,7 +347,14 @@ export async function apply(ctx: Context) {
             await vite.close().catch((e) => console.error(e));
         };
     } else {
-        ctx.Route('ui_next_constants', '/plugins/:version/:name', UiNextConstantHandler);
+        const build = async () => {
+            await buildPlugins();
+            await buildI18n();
+            await buildCodeLangs();
+            await buildVersions();
+        };
+        ctx.on('app/started', build);
+
         ctx.server.registerRenderer('next', {
             name: 'next',
             accept: [],
@@ -298,19 +377,25 @@ export async function apply(ctx: Context) {
                     url: context.handler.context.req.url!,
                     route_map: ctx.server.routeMap,
                     endpoint: ctx.setting.get('server.url') || undefined,
-                    plugins_url: `/plugins/${hashes['plugins.js'] || '00000000'}/plugins.js`,
+                    plugins_url: `/plugins/${hashes['plugins.js'] || HASH_FALLBACK}/plugins.js`,
                 }, serializer(false, context.handler));
-                return html.replace(INJECT_MARKER, buildInject(serialized));
+                const prodAssetUrl = (name: string) => `/plugins/${hashes[name] || HASH_FALLBACK}/${name}`;
+                const injectHtml = [
+                    buildInject(serialized),
+                    ...injectedScripts(prodAssetUrl, getViewLang(context.handler)),
+                ].join('\n');
+                return html.replace(INJECT_MARKER, injectHtml);
             },
         });
-        ctx.on('app/started', buildPlugins);
-        const debouncedBuild = ctx.debounce(buildPlugins, 2000);
+        const debouncedBuild = ctx.debounce(build, 2000);
         const triggerHotUpdate = (filePath?: string) => {
             if (filePath && !filePath.includes('/ui/')) return;
             debouncedBuild();
         };
         ctx.on('app/watch/change', triggerHotUpdate);
         ctx.on('app/watch/unlink', triggerHotUpdate);
-        ctx.on('system/setting', () => debouncedBuild());
+        ctx.on('system/setting-loaded', buildCodeLangs);
+        ctx.on('system/setting', debouncedBuild);
+        ctx.on('app/i18n/update', debouncedBuild);
     }
 }
diff --git a/packages/ui-next/package.json b/packages/ui-next/package.json
index dbfb8ffc6..9f3c5261c 100644
--- a/packages/ui-next/package.json
+++ b/packages/ui-next/package.json
@@ -29,6 +29,7 @@
     "esbuild": "0.25.2",
     "is-relative-url": "^4.1.0",
     "path-to-regexp": "^8.4.2",
+    "simple-git": "^3.36.0",
     "react": "^19.2.8",
     "react-dom": "^19.2.8"
   },