Show language menu text in other language

Done to improve UX so that people that do not understand Norwegian, have
a word  they understand, to change the language to English with.

Resolves: GREG-198

frontend/src/components/languageselector/index.tsx

@@ -39,6 +39,7 @@ function LanguageSelector({ noPadding }: { noPadding: boolean }) {
       labelId="language-select"
       label={t('header.selectLanguage')}
       defaultValue={selectedLanguage}
+      renderValue={() => (i18n.language !== 'en' ? 'Language' : 'Språk')}
       sx={sx}
       variant="standard"
       value={selectedLanguage}