* 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)/(public)/hotelreservation/(standard)/page.tsx

@@ -3,7 +3,6 @@ import { Suspense } from "react"
 import { env } from "@/env/server"
 
 import TrackingSDK from "@/components/TrackingSDK"
-import { setLang } from "@/i18n/serverContext"
 
 import styles from "./page.module.css"
 
@@ -14,8 +13,6 @@ import {
 import type { LangParams, PageArgs } from "@/types/params"
 
 export default function HotelReservationPage({ params }: PageArgs<LangParams>) {
-  setLang(params.lang)
-
   if (!env.ENABLE_BOOKING_WIDGET_HOTELRESERVATION_PATH) {
     return null
   }