docs: async function setPreferredMcpLanguage(accessToken, languageCode) {
      let language = getValidLanguageOrThrow(languageCode);
  
      let currentLanguages = await getPreferredMcpLanguages(accessToken);
  
      return mcpCustomizr.putSettings(accessToken, {
          language: updatePreferredLanguage(language, currentLanguages),
      });
  }