tinymce · kemister85 · Apr 13, 2026 · Apr 28, 2026 · Apr 28, 2026 · Apr 28, 2026
@@ -411,11 +411,7 @@
 // Remove un-used-for-this-particular-release entries.
 *** {productname} 8.5.0
 **** xref:8.5.0-release-notes.adoc#overview[Overview]
-**** xref:8.5.0-release-notes.adoc#new-premium-plugin<s>[New Premium Plugin<s>]
-**** xref:8.5.0-release-notes.adoc#new-open-source-plugin<s>[New Open Source Plugin<s>]
 **** xref:8.5.0-release-notes.adoc#accompanying-premium-plugin-changes[Accompanying Premium Plugin changes]
-**** xref:8.5.0-release-notes.adoc#accompanying-premium-plugin-end-of-life-announcement[Accompanying Premium Plugin end-of-life announcement]
-**** xref:8.5.0-release-notes.adoc#accompanying-open-source-plugin-end-of-life-announcement[Accompanying Open Source Plugin end-of-life announcement]
 **** xref:8.5.0-release-notes.adoc#accompanying-enhanced-skins-and-icon-packs-changes[Accompanying Enhanced Skins & Icon Packs changes]
 **** xref:8.5.0-release-notes.adoc#improvements[Improvements]
 **** xref:8.5.0-release-notes.adoc#additions[Additions]

@@ -6,7 +6,27 @@ NOTE: This is the {productname} Community version changelog. For information abo
 
 == xref:8.5.0-release-notes.adoc[8.5.0 - 2026-04-29]
 
-//TODO
+### Added
+* New `content_language` option to set the `lang` attribute on the iframe's `html` element or the inline editor's target element.
+// #TINY-11214
+
+### Improved
+* Improved visual styling of inline diff highlights in Suggested Edits and TinyMCE AI plugin.
+// #TINY-13958
+
+### Fixed
+* Script elements would incorrectly be removed by DomPurify when considered valid in the schema.
+// #TINY-9655
+* Iframe elements with children would incorrectly be removed by DomPurify.
+// #TINY-9655
+* Certain combinations of divs inside of lists would cause issues turning off lists.
+// #TINY-14070
+* Certain selections would delete the editor body, causing issues.
+// #TINY-14149
+* URIs with non-Latin1 characters were returning an error.
+// #TINY-13938
+* Alert and confirm dialogs were not announced properly by some screen readers.
+// #TINY-13812
 
 == xref:8.4.0-release-notes.adoc[8.4.0 - 2026-02-04]
 

@@ -3,6 +3,10 @@
 :description_short: Localize TinyMCE for your language, including directionality.
 :description: These settings configure TinyMCE's language capabilities, including right-to-left support.
 
+== Setting the default content language
+
+include::partial$configuration/content_language.adoc[leveloffset=+1]
+
 == Setting the language on content
 
 include::partial$configuration/content_langs.adoc[leveloffset=+1]

@@ -41,7 +41,7 @@ include::partial$misc/bundling-guide-link.adoc[]
 [WARNING]
 ====
 **Certain elements may be removed by XSS sanitization**  
-By default, {productname} sanitizes HTML content to protect against XSS attacks. Elements outside the HTML5 specification, such as `<script>`, are removed. Standard `<meta>` tags are preserved, but attributes not defined in the HTML5 spec (for example, the RDFa `property` attribute) require explicit configuration to be retained.
+By default, {productname} sanitizes HTML content to protect against XSS attacks. Elements outside the HTML5 specification, such as `<script>`, are removed unless explicitly allowed through xref:content-filtering.adoc#valid_elements[`+valid_elements+`] or xref:content-filtering.adoc#extended_valid_elements[`+extended_valid_elements+`]. Standard `<meta>` tags are preserved, but attributes not defined in the HTML5 spec (for example, the RDFa `property` attribute) require explicit configuration to be retained.
 
 If integrators encounter issues with required elements being removed, the following configuration options are available. These options reduce security and should be used with caution:
 

@@ -0,0 +1,24 @@
+[[content_language]]
+== `content_language`
+
+The `+content_language+` option sets the default content language of the editor by applying a `+lang+` attribute to the document element. In classic (iframe) mode, the attribute is set on the `+<html>+` element inside the editor's iframe. In inline mode, the attribute is set on the target element specified in the editor's `+selector+` option.
+
+Setting this option helps meet accessibility standards such as link:https://www.w3.org/WAI/standards-guidelines/act/rules/b5c3f8/[WCAG Success Criterion 3.1.1 (Language of Page)], which requires that the default human language of a web page can be programmatically determined.
+
+NOTE: This option is separate from the xref:ui-localization.adoc#language[`+language+`] option, which controls the language of the {productname} user interface. The `+content_language+` option controls only the language attribute of the editor content area.
+
+When the xref:introduction-to-tiny-spellchecker.adoc[Spell Checker] plugin is active, it uses `+content_language+` as its default proofing language. If `+content_language+` is not set, the Spell Checker falls back to xref:introduction-to-tiny-spellchecker.adoc#spellchecker_language[`+spellchecker_language+`].
+
+*Type:* `+String+`
+
+*Default value:* Not set (`+undefined+`)
+
+=== Example: using `content_language`
+
+[source,js]
+----
+tinymce.init({
+  selector: 'textarea',  // change this value according to your HTML
+  content_language: 'fr'
+});
+----
@@ -1,6 +1,8 @@
 [[spellchecker_language]]
 == `+spellchecker_language+`
 
+IMPORTANT: This option has been marked as *deprecated* as of {productname} 8.5. It will be removed in a future major release. Use xref:content-localization.adoc#content_language[`+content_language+`] instead, which sets both the default content language and the Spell Checker proofing language.
+
 This option specifies the default language used by Spell Checker.
 
 *Type:* `+String+`

@@ -6,7 +6,7 @@ Supported versions of {productname}:
 [cols="^,^,^",options="header"]
 |===
 |Version |Release Date |End of Premium Support
-|8.5 |2026-04-29 |2027-04-29
+|8.5 |2026-04-29 |2027-10-29
 |8.4 |2026-03-31 |2027-09-30
 |8.3 |2025-12-10 |2027-06-10
 |8.2 |2025-10-22 |2027-04-22