* move setLang() to a root layout

* fix: findLang only returns acceptable languages
* fix: fallback to use header x-lang if we haven't setLang yet
* fix: languageSchema, allow uppercase

Approved-by: Linus Flood

app/[lang]/(live)/middleware-error/404/page.tsx

@@ -1,10 +1,7 @@
 import NotFound from "@/components/Current/NotFound"
-import { setLang } from "@/i18n/serverContext"
 
 import type { LangParams, PageArgs } from "@/types/params"
 
-export default function NotFoundPage({ params }: PageArgs<LangParams>) {
-  setLang(params.lang)
-
+export default function NotFoundPage({}: PageArgs<LangParams>) {
   return <NotFound />
 }