diff -ruN a/Classes/DataHandling/SlugHelper.php b/Classes/DataHandling/SlugHelper.php
--- a/Classes/DataHandling/SlugHelper.php	2021-12-06 15:08:58.000000000 +0100
+++ b/Classes/DataHandling/SlugHelper.php	2021-12-06 15:48:14.000000000 +0100
@@ -111,8 +111,11 @@
         $slug = strip_tags($slug);

         // Convert some special tokens (space, "_" and "-") to the space character
+        $dashes = ['-', '_'];
+        $allowDashCharacters = (bool)($this->configuration['allowDashCharacters'] ?? false);
         $fallbackCharacter = (string)($this->configuration['fallbackCharacter'] ?? '-');
-        $slug = preg_replace('/[ \t\x{00A0}\-+_]+/u', $fallbackCharacter, $slug);
+        $fallbackCharacterPattern = $allowDashCharacters ? '/[ \t\x{00A0}+]+/u' : '/[ \t\x{00A0}\-+_]+/u';
+        $slug = (string)preg_replace($fallbackCharacterPattern, $fallbackCharacter, $slug);

         if (!\Normalizer::isNormalized((string)$slug)) {
             $slug = \Normalizer::normalize((string)$slug);
@@ -122,14 +125,31 @@
         // The specCharsToASCII() converts "€" to "EUR"
         $slug = GeneralUtility::makeInstance(CharsetConverter::class)->specCharsToASCII('utf-8', $slug);

-        // Get rid of all invalid characters, but allow slashes
-        $slug = preg_replace('/[^\p{L}\p{M}0-9\/' . preg_quote($fallbackCharacter) . ']/u', '', $slug);
+        // Get rid of all invalid characters, but allow slashes and dashes
+        $validChars =  preg_quote($fallbackCharacter);
+        if ($allowDashCharacters) {
+            foreach ($dashes as $dash) {
+                if ($dash !== $fallbackCharacter) {
+                    $validChars .= preg_quote($dash);
+                }
+            }
+        }
+        $slug = (string)preg_replace('/[^\p{L}\p{M}0-9\/' . $validChars . ']/u', '', $slug);

         // Convert multiple fallback characters to a single one
         if ($fallbackCharacter !== '') {
             $slug = preg_replace('/' . preg_quote($fallbackCharacter) . '{2,}/', $fallbackCharacter, $slug);
         }

+        // Convert multiple dashes to a single one
+        if ($allowDashCharacters) {
+            foreach ($dashes as $dash) {
+                if ($dash !== $fallbackCharacter) {
+                    $slug = (string)preg_replace('/' . preg_quote($dash) . '{2,}/', $dash, $slug);
+                }
+            }
+        }
+
         // Ensure slug is lower cased after all replacement was done
         $slug = mb_strtolower($slug, 'utf-8');
         // Extract slug, thus it does not have wrapping fallback and slash characters