* 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

components/Current/NotFound/index.tsx

@@ -5,7 +5,9 @@ import { texts } from "./Texts"
 import styles from "./notFound.module.css"
 
 export default function NotFound() {
-  const infoTexts = texts[getLang()]
+  const lang = getLang()
+  const infoTexts = texts[lang]
+
   return (
     <div className={styles.container}>
       <div className={styles.content}>