#428

frontend/src/lib/routeLocales.ts

@@ -0,0 +1,13 @@
+import { matchPath } from 'react-router-dom'
+
+import { unlocalisedPath } from '@/lib/locales'
+
+import type { LocaleCode } from '@/lib/locales'
+
+const PAGE_LOCALES: { path: string; locale: LocaleCode }[] = [
+    { path: '/gekanator', locale: 'ja' }]
+
+
+export const requiredPageLocale = (pathname: string): LocaleCode | null =>
+    PAGE_LOCALES.find (page =>
+	matchPath ({ path: page.path, end: true }, unlocalisedPath (pathname)))?.locale ?? null