diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index aa8428a744..ffa5c52722 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -58,6 +58,7 @@ Changelog
  * Fix: Retain query parameters when switching between locales in the page chooser (Abdelrahman Hamada, Sage Abdullah)
  * Fix: Add `w-kbd-scope-value` with support for `global` so that specific keyboard shortcuts (e.g. ctrl+s/cmd+s) trigger consistently even when focused on fields (Neeraj Yetheendran)
  * Fix: Improve exception handling when generating image renditions concurrently (Andy Babic)
+ * Fix: Respect `WAGTAIL_ALLOW_UNICODE_SLUGS` setting when auto-generating slugs (LB (Ben) Johnston)
  * Docs: Add contributing development documentation on how to work with a fork of Wagtail (Nix Asteri, Dan Braghis)
  * Docs: Make sure the settings panel is listed in tabbed interface examples (Tibor Leupold)
  * Docs: Update content and page names to their US spelling instead of UK spelling (Victoria Poromon)
diff --git a/client/src/controllers/SlugController.test.js b/client/src/controllers/SlugController.test.js
index 38a71d07da..6fad12efec 100644
--- a/client/src/controllers/SlugController.test.js
+++ b/client/src/controllers/SlugController.test.js
@@ -45,7 +45,7 @@ describe('SlugController', () => {
     expect(slugInput.value).toEqual('visiter-toulouse-en-t-2025');
   });
 
-  it('should now allow unicode characters by default', () => {
+  it('should allow unicode characters when allow-unicode-value is set to truthy', () => {
     const slugInput = document.querySelector('#id_slug');
     slugInput.setAttribute('data-w-slug-allow-unicode-value', 'true');
 
@@ -267,7 +267,7 @@ describe('urlify behaviour', () => {
     expect(slugInput.value).toBe('urlify-testing-on-edit-page');
   });
 
-  it('should transform input with special characters to their ASCII equivalent', () => {
+  it('should transform input with special (unicode) characters to their ASCII equivalent by default', () => {
     const slugInput = document.getElementById('id_slug');
     slugInput.value = 'Some Title with éçà Spaces';
 
@@ -280,6 +280,21 @@ describe('urlify behaviour', () => {
     expect(slugInput.value).toBe('some-title-with-eca-spaces');
   });
 
+  it('should transform input with special (unicode) characters to keep unicode values if allow unicode value is truthy', () => {
+    const value = 'Dê-me fatias de   pizza de manhã --ou-- à noite';
+
+    const slugInput = document.getElementById('id_slug');
+    slugInput.setAttribute('data-w-slug-allow-unicode-value', 'true');
+
+    slugInput.value = value;
+
+    const event = new CustomEvent('custom:event', { detail: { value } });
+
+    document.getElementById('id_slug').dispatchEvent(event);
+
+    expect(slugInput.value).toBe('dê-me-fatias-de-pizza-de-manhã-ou-à-noite');
+  });
+
   it('should return an empty string when input contains only special characters', () => {
     const slugInput = document.getElementById('id_slug');
     slugInput.value = '$$!@#$%^&*';
diff --git a/client/src/controllers/SlugController.ts b/client/src/controllers/SlugController.ts
index f3b86fc54f..3d1eccac18 100644
--- a/client/src/controllers/SlugController.ts
+++ b/client/src/controllers/SlugController.ts
@@ -89,12 +89,12 @@ export class SlugController extends Controller<HTMLInputElement> {
     event: CustomEvent<{ value: string }> | { detail: { value: string } },
     ignoreUpdate = false,
   ) {
+    const allowUnicode = this.allowUnicodeValue;
     const { value = this.element.value } = event?.detail || {};
-
     const trimmedValue = value.trim();
 
     const newValue =
-      urlify(trimmedValue) ||
+      urlify(trimmedValue, { allowUnicode }) ||
       this.slugify({ detail: { value: trimmedValue } }, true);
 
     if (!ignoreUpdate) {
diff --git a/docs/releases/6.1.md b/docs/releases/6.1.md
index 010690d6a6..9a4b8e8e7c 100644
--- a/docs/releases/6.1.md
+++ b/docs/releases/6.1.md
@@ -87,6 +87,7 @@ This feature was developed by Ben Enright and Thibaud Colas.
  * Retain query parameters when switching between locales in the page chooser (Abdelrahman Hamada, Sage Abdullah)
  * Add `w-kbd-scope-value` with support for `global` so that specific keyboard shortcuts (e.g. ctrl+s/cmd+s) trigger consistently even when focused on fields (Neeraj Yetheendran)
  * Improve exception handling when generating image renditions concurrently (Andy Babic)
+ * Respect `WAGTAIL_ALLOW_UNICODE_SLUGS` setting when auto-generating slugs (LB (Ben) Johnston)
 
 
 ### Documentation