Can I create slug with unicode letters since all the major browsers support unicode urls (so it won't be transformed into the utf8 equivalent), or should I always use English letters?For example: If I want to create a slug out of the words Buenos das, should it be http://example.com/buenos-das or http://example.com/buenos-dias?
Should slug (SEO/user friendly URLs) contain only English letters?
seo;url;internationalization