Issue #2895315 by nielsstampe, Krzysztof Domański: Danish characters are not translated correctly with transliteration

core/lib/Drupal/Component/Transliteration/data/da.php

@@ -5,7 +5,7 @@
  * Danish transliteration data for the PhpTransliteration class.
  */
 
-$overrides['dk'] = [
+$overrides['da'] = [
   0xC5 => 'Aa',
   0xD8 => 'Oe',
   0xE5 => 'aa',

core/tests/Drupal/Tests/Component/Transliteration/PhpTransliterationTest.php

@@ -136,8 +136,8 @@ class PhpTransliterationTest extends TestCase {
       // Test language overrides provided by core.
       ['de', $two_byte, 'Ae Oe Ue A O aeoeueaohello'],
       ['de', $random, $random],
-      ['dk', $two_byte, 'A O U Aa Oe aouaaoehello'],
-      ['dk', $random, $random],
+      ['da', $two_byte, 'A O U Aa Oe aouaaoehello'],
+      ['da', $random, $random],
       ['kg', $three_byte, 'ts'],
       // Test strings in some other languages.
       // Turkish, provided by drupal.org user Kartagis.