Pending course, rest ready for launch

lib/i18n/clientLocale.ts

@@ -0,0 +1,7 @@
+export type ClientLocale = "en" | "es";
+
+export function getClientLocale(): ClientLocale {
+  if (typeof navigator === "undefined") return "en";
+  const language = navigator.language?.toLowerCase() ?? "en";
+  return language.startsWith("es") ? "es" : "en";
+}