Multiple URLS per post non-ascii

by

  1. Add a new field below the post title and use something like my transliteration table to convert the post slug to US-ASCII. Then save that new slug in a meta field.

  2. Hook into 404_template (example), and run a meta query for the current slug.

  3. If you found something, use get_permalink() for the result and wp_redirect() to send the user to the correct location.