🐛 Fix locale detection (#1631)

packages/languages/src/get-preferred-locale.ts

@@ -0,0 +1,17 @@
+import languages, { defaultLocale } from "./index";
+import Negotiator from "negotiator";
+import { match } from "@formatjs/intl-localematcher";
+import type { NextRequest } from "next/server";
+
+const locales = Object.keys(languages);
+
+export async function getPreferredLocale(req: NextRequest) {
+  const preferredLanguages = new Negotiator({
+    headers: {
+      "accept-language": req.headers.get("accept-language") ?? "",
+    },
+  }).languages();
+
+  const locale = match(preferredLanguages, locales, defaultLocale);
+  return locale;
+}

packages/languages/src/index.ts

@@ -0,0 +1,7 @@
+import languages from "./languages.json";
+
+export const supportedLngs = Object.keys(languages);
+
+export const defaultLocale = "en";
+
+export default languages;

packages/languages/src/languages.json

@@ -0,0 +1,25 @@
+{
+  "eu": "Basque",
+  "ca": "Català",
+  "cs": "Česky",
+  "da": "Dansk",
+  "de": "Deutsch",
+  "en": "English",
+  "en-GB": "English (UK)",
+  "es": "Español",
+  "fr": "Français",
+  "hr": "Hrvatski",
+  "it": "Italiano",
+  "hu": "Magyar",
+  "nl": "Nederlands",
+  "no": "Norsk",
+  "pl": "Polski",
+  "pt-BR": "Português - Brasil",
+  "ru": "Русский",
+  "sk": "Slovenčina",
+  "fi": "Suomi",
+  "sv": "Svenska",
+  "tr": "Türkçe",
+  "zh": "简体中文",
+  "zh-Hant": "繁體中文"
+}