[wp-trac] [WordPress Trac] #53684: Faulty substitution of German umlauts in slugs and keywords

[WordPress Trac]

#53684: Faulty substitution of German umlauts in slugs and keywords
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 Reporter:  spielautomat4  |      Owner:  (none)
     Type:  defect (bug)   |     Status:  new
 Priority:  normal         |  Milestone:  Awaiting Review
Component:  Permalinks     |    Version:  5.7.2
 Severity:  normal         |   Keywords:
  Focuses:                 |
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 Just submitted #53682 because handling of keywords seemed odd.

 In addition to that I just noticed that German umlauts in post slugs and
 new keywords are no longer substituted correctly. When using "ü" in a post
 title, for example, the letter used to be replaced by "ue" in the slug
 (''which is correct from a grammatical standpoint'').

 There are a lot of old posts in my blog that proof, this was done
 correctly in the past. With the latest WordPress 5.7.2, however, German
 umlauts are no longer replaced by "ue", "oe" or "ae". Instead WordPress
 now uses "u", "o" or "a" for substitution (''which is not correct'').

 This also applies to "ß" being replaced by "ss" (now only "s").

 Not sure, though, if this change was a design decision or is a bug.

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Ticket URL: <https://core.trac.wordpress.org/ticket/53684>
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