This redirect leads to its target in accordance with the naming conventions for titles in other languages and can help writing and searches. However, per WP:NOTBROKEN do not replace these redirected links with a piped link.
From a page move: This is a redirect from a page that has been moved (renamed). This page was kept as a redirect to avoid breaking links, both internal and external, that may have been made to the old page name.
From the same page name with diacritics: This is a redirect from a page name that has diacritical marks (accents, umlauts, etc.) to essentially the same page name without those marks or a "List of..." page anchored to a promising list item name without diacritics.
Apply this redirect (without piping) when the subject page concerns language translation or foreign language equivalents. Other pages that use this redirect should be updated with a direct link to the redirect target (again, without piping).