What is a common real world use case for the Context API besides sharing a theme?

Context is commonly used for information that many parts of an app need at once, such as the currently logged in user, the selected language for translations, or shopping cart contents in an online store, avoiding the need to pass this shared data through many layers of components manually.

const LanguageContext = React.createContext('english');

function App() {
  const [language, setLanguage] = useState('english');
  return (
    <LanguageContext.Provider value={language}>
      <Header />
      <MainContent />
    </LanguageContext.Provider>
  );
}