add missing language selector component

frontend/search/components/user/LanguageSelection.tsx

@@ -0,0 +1,19 @@
+import i18next from 'i18next'
+import '../../i18n/config'
+
+
+export default () => {
+  const languages =   [{id: 'de', name: 'Deutsch'}, {id: 'en', name: 'Englisch'}]
+
+  return  (
+    <div>
+     { languages.map( lang => (
+         <span key={lang.id}>
+           <button title={lang.name}
+	        onClick={() => i18next.changeLanguage(lang.id)}
+           >{lang.name}</button>
+         </span>
+       ))}
+    </div>
+  )
+}