website-astro/src/pages/articles/[...slug].astro

---
import { astroI18n, extractRouteLangCode } from "astro-i18n";
astroI18n.init(Astro);

import { getCollection } from "astro:content";
import EditorialContent from "../../components/EditorialContent.astro";

import BaseLayout from "../../layouts/BaseLayout.astro";

export async function getStaticPaths() {
	const articles = await getCollection("articles", ({ data }) => {
		console.log(extractRouteLangCode(import.meta.url));
		return data.lang === extractRouteLangCode(import.meta.url);
	});
	return articles.map((article) => ({
		params: { slug: article.slug },
		props: { article },
	}));
}

const { article } = Astro.props;
---

<BaseLayout pageTitle={article.data.title}>
	{article.data.lang}
	<EditorialContent content={article} />
</BaseLayout>