Basic router on top of Next.js

routes.js

import { include, createRouter } from "./lib/router";

const commonRoutes = [
  {
    path: "/terms-of-business/",
    name: "terms-of-business",
    page: "TermsOfBusinessPage",
  },
];

const esRoutes = [
  include({ routes: commonRoutes }),
  {
    path: "/",
    name: "homepage",
    page: "HomepageEs",
  },
];

const ieRoutes = [
  include({ routes: commonRoutes }),
  {
    path: "/",
    name: "homepage",
    page: "HomepageIe",
  },
];

const gbRoutes = [
  include({ routes: commonRoutes }),
  {
    path: "/",
    name: "homepage",
    page: "HomepageGb",
  },
];

const routeConfig = include({
  routes: [
    include({ routes: gbRoutes }),
    include({
      routes: ieRoutes,
      prefix: "/ie/",
      params: { language: "en", country: "ie" },
    }),
    include({
      routes: esRoutes,
      prefix: "/es/",
      params: { language: "es", country: "es" },
    }),
  ],
  params: { language: "en", country: "gb" }, // Default to GB
});

export { routeConfig };

const router = createRouter({
  routes: routeConfig,
});

export default router;