diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index 3c62001..41a36b3 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -3,6 +3,7 @@ import { AnimatePresence, LayoutGroup, MotionConfig, motion } from 'framer-motio
 import { Suspense, lazy, useEffect, useLayoutEffect, useMemo, useState } from 'react'
 import { useTranslation } from 'react-i18next'
 import { createBrowserRouter,
+	 matchRoutes,
 	 Navigate,
 	 RouterProvider,
 	 useLocation,
@@ -16,9 +17,10 @@ import DialogueProvider from '@/components/dialogues/DialogueProvider'
 import PageHead from '@/components/common/PageHead'
 import { Toaster } from '@/components/ui/toaster'
 import { apiPost, isApiError } from '@/lib/api'
-import { fetchLocales, isLocaleCode, legacyLocalePath, switchLocalePath } from '@/lib/locales'
+import { prepareHelpPage } from '@/lib/help'
+import { fetchLocales, isLocaleCode, legacyLocalePath,
+	 switchLocalePath, unlocalisedPath } from '@/lib/locales'
 import { localesKeys } from '@/lib/queryKeys'
-import { requiredPageLocale } from '@/lib/routeLocales'
 import { useLocale } from '@/lib/useLocale'
 import { applyClientAnimationMode,
 	 applyClientAppearance,
@@ -37,10 +39,11 @@ import HelpDetailPage from '@/pages/help/HelpDetailPage'
 import ServiceUnavailable from '@/pages/ServiceUnavailable'
 
 import type { Dispatch, FC, ReactNode, SetStateAction } from 'react'
-import type { RouteObject } from 'react-router-dom'
+import type { RouteMatch } from 'react-router-dom'
 
 import type { ClientAnimationMode } from '@/lib/settings'
 import type { AvailableLocale } from '@/lib/locales'
+import type { PageRoute } from '@/lib/routeLocales'
 import type { User } from '@/types'
 
 const GekanatorPage = lazy (() => import ('@/pages/GekanatorPage'))
@@ -80,7 +83,7 @@ const WikiSearchPage = lazy (() => import ('@/pages/wiki/WikiSearchPage'))
 const GekanatorRoute = ({ user }: { user: User | null }) => {
   const locale = useLocale ()
   const location = useLocation ()
-  const pageLocale = requiredPageLocale (location.pathname)
+  const pageLocale = resolvePageRoute (location.pathname)?.route.handle?.locale
 
   if (pageLocale != null && pageLocale !== locale)
     return <GekanatorUnavailablePage/>
@@ -95,7 +98,7 @@ const GekanatorRoute = ({ user }: { user: User | null }) => {
 export const pageRoutes = (
     user: User | null,
     setUser: Dispatch<SetStateAction<User | null>>,
-): RouteObject[] => [
+): PageRoute[] => [
     { path: '', element: <LocaleRedirect to="/posts"/> },
     { path: 'posts', element: <PostListPage/> },
     { path: 'posts/new', element: <PostNewPage user={user}/> },
@@ -124,13 +127,24 @@ export const pageRoutes = (
     { path: 'help', element: <HelpListPage/> },
     { path: 'help/changes', element: <HelpChangesPage/> },
     { path: 'help/:identifier/diff', element: <HelpDiffPage/> },
-    { path: 'help/:identifier', element: <HelpDetailPage/> },
+    { id: 'help.detail', path: 'help/:identifier', element: <HelpDetailPage/>,
+      handle: { ssr: prepareHelpPage } },
     { path: 'users/settings', element: <SettingPage user={user} setUser={setUser}/> },
     { path: 'settings', element: <LocaleRedirect to="/users/settings"/> },
     { path: 'tos', element: <TOSPage/> },
-    { path: 'gekanator', element: <GekanatorRoute user={user}/> },
+    { id: 'gekanator', path: 'gekanator', element: <GekanatorRoute user={user}/>,
+      handle: { locale: 'ja' } },
     { path: 'more', element: <MorePage/> },
-    { path: '*', element: <NotFound/> }]
+    { path: '*', element: <NotFound/>, handle: { notFound: true } }]
+
+
+export const resolvePageRoute = (
+    pathname: string,
+): RouteMatch<string, PageRoute> | null => {
+  const match = matchRoutes<PageRoute> (
+      pageRoutes (null, () => { }), unlocalisedPath (pathname))?.at (-1)
+  return (match == null || match.route.handle?.notFound) ? null : match
+}
 
 
 const RouteTransitionWrapper = ({ animationMode, user, setUser }: {
diff --git a/frontend/src/components/PostEditForm.tsx b/frontend/src/components/PostEditForm.tsx
index 7c84726..57c6593 100644
--- a/frontend/src/components/PostEditForm.tsx
+++ b/frontend/src/components/PostEditForm.tsx
@@ -74,12 +74,15 @@ const PostEditForm: FC<Props> = ({ post, onSave }) => {
 
   const dialogue = useDialogue ()
 
-  const update = async (...args: Parameters<typeof updatePost>) => {
+  const update = async (
+      postData: Parameters<typeof updatePost>[0],
+      options: Parameters<typeof updatePost>[1],
+  ) => {
     clearValidationErrors ()
 
     try
     {
-      const data = await updatePost (...args, undefined, locale)
+      const data = await updatePost (postData, options, locale)
       onSave ({ ...post,
 		versionNo:              data.versionNo,
 		title:                  data.title,
diff --git a/frontend/src/components/ui/use-toast.tsx b/frontend/src/components/ui/use-toast.tsx
index dcfbd7d..0762e80 100644
--- a/frontend/src/components/ui/use-toast.tsx
+++ b/frontend/src/components/ui/use-toast.tsx
@@ -11,7 +11,7 @@ import type {
 const TOAST_LIMIT = 1
 const TOAST_REMOVE_DELAY = 1000000
 
-type ToasterToast = ToastProps & {
+type ToasterToast = Omit<ToastProps, 'title'> & {
   id: string
   title?: React.ReactNode
   description?: React.ReactNode
diff --git a/frontend/src/entry-server.tsx b/frontend/src/entry-server.tsx
index f685398..8c4e28e 100644
--- a/frontend/src/entry-server.tsx
+++ b/frontend/src/entry-server.tsx
@@ -2,15 +2,12 @@ import { QueryClient, QueryClientProvider, dehydrate } from '@tanstack/react-que
 import { renderToString } from 'react-dom/server'
 import { HelmetProvider } from 'react-helmet-async'
 import { I18nextProvider } from 'react-i18next'
-import { matchRoutes } from 'react-router-dom'
 import { createStaticHandler, createStaticRouter,
 	 StaticRouterProvider } from 'react-router-dom/server'
 
-import { AppFrame, appRoutes, pageRoutes } from '@/App'
-import { matchHelpDetail, prepareHelpPage } from '@/lib/help'
+import { AppFrame, appRoutes, resolvePageRoute } from '@/App'
 import { createUII18n } from '@/lib/i18n'
-import { fetchLocales, isLocaleCode, legacyLocalePath,
-	 unlocalisedPath } from '@/lib/locales'
+import { fetchLocales, isLocaleCode, legacyLocalePath } from '@/lib/locales'
 import { localesKeys } from '@/lib/queryKeys'
 import { withRenderContext } from '@/lib/renderContext.server'
 
@@ -35,13 +32,11 @@ export const render = async (
   const legacy = legacyLocalePath ({ pathname: url.pathname, search: url.search, hash: '' })
   const pathname = legacy == null ? url.pathname : new URL (legacy, origin).pathname
   const segment = pathname.split ('/')[1]
-  const known = matchRoutes (pageRoutes (null, () => { })
-      .filter (route => route.path !== '*'), unlocalisedPath (pathname))
+  const known = resolvePageRoute (pathname)
   if (!(isLocaleCode (segment)) || known == null)
     return { status: 404 }
   if (legacy != null)
     return { status: 308, location: legacy }
-  const match = matchHelpDetail (url.pathname)
   const locale = segment
   return withRenderContext ({ pathname: url.pathname, origin, apiBaseURL }, async () => {
     const client = new QueryClient ({ defaultOptions: {
@@ -53,9 +48,11 @@ export const render = async (
       const active = locales.locales.some (entry => entry.code === locale)
       if (!(active))
 	return { status: 404 as const }
-      if (match == null || known.at (-1)?.route.path !== 'help/:identifier')
+      const prepare = known.route.handle?.ssr
+      if (prepare == null)
 	return null
-      const status = await prepareHelpPage (client, url)
+      const status = await prepare ({ client, params: known.params, locale,
+	  searchParams: url.searchParams })
       const instance = createUII18n (locale)
       const handler = createStaticHandler (appRoutes)
       const context = await handler.query (new Request (url))
diff --git a/frontend/src/lib/help.ts b/frontend/src/lib/help.ts
index 06128a2..e594085 100644
--- a/frontend/src/lib/help.ts
+++ b/frontend/src/lib/help.ts
@@ -1,9 +1,10 @@
-import { isLocaleCode, localeLanguage } from '@/lib/locales'
+import { localeLanguage } from '@/lib/locales'
 import { helpKeys } from '@/lib/queryKeys'
 
-import type { QueryClient } from '@tanstack/react-query'
 import type { ComponentType } from 'react'
 
+import type { PagePreparation } from '@/lib/routeLocales'
+
 type ArticleLanguage = { currentEdition: string; publishedEditions: string[] }
 
 export type ArticleMeta = {
@@ -97,34 +98,21 @@ export const resolveHelpLanguage = (
     : null
 
 
-export const matchHelpDetail = (pathname: string): RegExpMatchArray | null => {
-  const matched = pathname.match (/^\/([^/]+)\/help\/([^/]+)\/?$/)
-  return matched?.[2] === 'changes' ? null : matched
-}
-
-
 // MDX functions stay in memory; both entries load them before rendering.
-export const prepareHelpPage = async (client: QueryClient, url: URL): Promise<number> => {
-  const matched = matchHelpDetail (url.pathname)
-  if (matched == null || !(isLocaleCode (matched[1])))
+export const prepareHelpPage = async (
+    { client, params, locale, searchParams }: PagePreparation,
+): Promise<number> => {
+  const identifier = params.identifier
+  if (identifier == null)
     return 404
-  let identifier: string
-  try
-  {
-    identifier = decodeURIComponent (matched[2])
-  }
-  catch
-  {
-    return 404
-  }
   const article = await client.fetchQuery ({
       queryKey: helpKeys.article (identifier),
       queryFn: () => getHelpArticle (identifier), staleTime: Infinity })
-  const language = resolveHelpLanguage (article, localeLanguage (matched[1]))
+  const language = resolveHelpLanguage (article, localeLanguage (locale))
   if (language == null)
     return 404
   const meta = article!.languages[language]
-  const edition = url.searchParams.get ('edition') ?? meta.currentEdition
+  const edition = searchParams.get ('edition') ?? meta.currentEdition
   if (!(meta.publishedEditions.includes (edition)) || parseHelpEdition (edition) == null)
     return 404
   const content = await client.fetchQuery ({
diff --git a/frontend/src/lib/prefetchers.ts b/frontend/src/lib/prefetchers.ts
index 4bb563d..e78e3d1 100644
--- a/frontend/src/lib/prefetchers.ts
+++ b/frontend/src/lib/prefetchers.ts
@@ -31,7 +31,7 @@ const boolFromQuery = (value: string | null): boolean =>
     ['1', 'true', 'on', 'yes', ''].includes ((value ?? '').toLowerCase ())
 
 
-const prefetchHelpIndex: Prefetcher = async (qc, url, locale) => {
+const prefetchHelpIndex: Prefetcher = async (qc, _url, locale) => {
   await qc.prefetchQuery ({
       queryKey: helpKeys.index (localeLanguage (locale)),
       queryFn: () => getHelpSearchEntries (localeLanguage (locale)),
@@ -63,7 +63,7 @@ const prefetchHelpShow: Prefetcher = async (qc, url, locale) => {
 }
 
 
-const prefetchHelpChanges: Prefetcher = async (qc, url, locale) => {
+const prefetchHelpChanges: Prefetcher = async (qc, _url, locale) => {
   await qc.prefetchQuery ({
       queryKey: helpKeys.changes (localeLanguage (locale)),
       queryFn: () => getHelpChanges (localeLanguage (locale)),
diff --git a/frontend/src/lib/routeLocales.ts b/frontend/src/lib/routeLocales.ts
index b4f5337..7775314 100644
--- a/frontend/src/lib/routeLocales.ts
+++ b/frontend/src/lib/routeLocales.ts
@@ -1,13 +1,19 @@
-import { matchPath } from 'react-router-dom'
-
-import { unlocalisedPath } from '@/lib/locales'
+import type { QueryClient } from '@tanstack/react-query'
+import type { IndexRouteObject, NonIndexRouteObject, Params } from 'react-router-dom'
 
 import type { LocaleCode } from '@/lib/locales'
 
-const PAGE_LOCALES: { path: string; locale: LocaleCode }[] = [
-    { path: '/gekanator', locale: 'ja' }]
+export type PagePreparation = {
+    client: QueryClient
+    params: Readonly<Params>
+    locale: LocaleCode
+    searchParams: URLSearchParams }
 
+export type PageRouteHandle = {
+    ssr?: (request: PagePreparation) => Promise<number>
+    locale?: LocaleCode
+    notFound?: boolean }
 
-export const requiredPageLocale = (pathname: string): LocaleCode | null =>
-    PAGE_LOCALES.find (page =>
-	matchPath ({ path: page.path, end: true }, unlocalisedPath (pathname)))?.locale ?? null
+export type PageRoute = { handle?: PageRouteHandle } & (
+    Omit<IndexRouteObject, 'handle'>
+    | (Omit<NonIndexRouteObject, 'handle' | 'children'> & { children?: PageRoute[] }))
diff --git a/frontend/src/locales/ain-Kana/history.json b/frontend/src/locales/ain-Kana/history.json
index 4ba959c..7170554 100644
--- a/frontend/src/locales/ain-Kana/history.json
+++ b/frontend/src/locales/ain-Kana/history.json
@@ -41,7 +41,7 @@
     "certified": "公証済み"
   },
   "languageNames": {
-    "ja": "日本語",
+    "ja": "シサㇺ　イタㇰ",
     "ain": "ヤウンモシルン　アイヌ　イタㇰ"
   },
   "revert": "アホシピレ",
diff --git a/frontend/src/locales/ja/history.json b/frontend/src/locales/ja/history.json
index 3d79308..b61935b 100644
--- a/frontend/src/locales/ja/history.json
+++ b/frontend/src/locales/ja/history.json
@@ -31,7 +31,7 @@
   },
   "languageNames": {
     "ja": "日本語",
-    "ain": "ヤウンモシルン　アイヌ　イタㇰ"
+    "ain": "北海道アイヌ語"
   },
   "revert": "差戻",
   "restored": "差戻しました．",
diff --git a/frontend/src/main.tsx b/frontend/src/main.tsx
index ef50446..61b2186 100644
--- a/frontend/src/main.tsx
+++ b/frontend/src/main.tsx
@@ -4,9 +4,8 @@ import { HelmetProvider } from 'react-helmet-async'
 import { I18nextProvider } from 'react-i18next'
 
 import '@/index.css'
-import App from '@/App'
+import App, { resolvePageRoute } from '@/App'
 import { createUII18n } from '@/lib/i18n'
-import { prepareHelpPage } from '@/lib/help'
 import { currentViewingLocale } from '@/lib/locales'
 import { localesKeys } from '@/lib/queryKeys'
 import { applyClientAnimationMode, getClientAnimationMode } from '@/lib/settings'
@@ -66,7 +65,13 @@ const start = () => {
       hydrate (client, data.state)
       if (client.getQueryData (localesKeys.index) == null)
 	throw new Error ('Missing SSR locales')
-      const status = await prepareHelpPage (client, new URL (window.location.href))
+      const url = new URL (window.location.href)
+      const match = resolvePageRoute (url.pathname)
+      const prepare = match?.route.handle?.ssr
+      if (match == null || prepare == null)
+	throw new Error ('Missing SSR route preparation')
+      const status = await prepare ({ client, params: match.params,
+	  locale: currentViewingLocale (), searchParams: url.searchParams })
       if (status !== data.status)
 	throw new Error ('Server and browser Help versions differ')
       mount (true)
diff --git a/frontend/src/pages/tags/TagHistoryPage.tsx b/frontend/src/pages/tags/TagHistoryPage.tsx
index 5370cae..69b07d0 100644
--- a/frontend/src/pages/tags/TagHistoryPage.tsx
+++ b/frontend/src/pages/tags/TagHistoryPage.tsx
@@ -72,11 +72,10 @@ const renderPrimaryName = (
     language: string,
     label: (key: string) => ReactNode,
 ) => (
-    <>
-      <span lang={language} className="inline-block whitespace-nowrap">{snapshot.name}</span>
-      {snapshot.name != null && snapshot.autoGenerated === true
-       && label ('nameChanges.uncertified')}
-    </>)
+    <span lang={language} className="whitespace-nowrap">
+      {snapshot.name}
+      {snapshot.name != null && snapshot.autoGenerated && label ('nameChanges.uncertified')}
+    </span>)
 
 
 const renderAliasDiff = (