diff --git a/AUTHORS.rst b/AUTHORS.rst
index f57795d4fa7..5c0f9bb9882 100644
--- a/AUTHORS.rst
+++ b/AUTHORS.rst
@@ -28,6 +28,7 @@ Contributors
 * Antonio Valentino -- qthelp builder, docstring inheritance
 * Antti Kaihola -- doctest extension (skipif option)
 * Barry Warsaw -- setup command improvements
+* Bart Kamphorst -- warning improvements
 * Ben Egan -- Napoleon improvements & viewcode improvements
 * Benjamin Peterson -- unittests
 * Blaise Laflamme -- pyramid theme
diff --git a/CHANGES.rst b/CHANGES.rst
index 9f7b8f91eba..6e30c9bc759 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -111,6 +111,8 @@ Features added
 * #13326: Remove hardcoding from handling :class:`~sphinx.addnodes.productionlist`
   nodes in all writers, to improve flexibility.
   Patch by Adam Turner.
+* #13335: Use ``misc.highlighting_failure`` subtype for Pygments unknown lexers.
+  Patch by Bart Kamphorst.
 
 Bugs fixed
 ----------
diff --git a/sphinx/highlighting.py b/sphinx/highlighting.py
index 5e1277f6cd7..dca2a03fe39 100644
--- a/sphinx/highlighting.py
+++ b/sphinx/highlighting.py
@@ -167,7 +167,11 @@ def get_lexer(
                     lexer = get_lexer_by_name(lang, **opts)
             except ClassNotFound:
                 logger.warning(
-                    __('Pygments lexer name %r is not known'), lang, location=location
+                    __('Pygments lexer name %r is not known'),
+                    lang,
+                    location=location,
+                    type='misc',
+                    subtype='higlighting_failure',
                 )
                 lexer = lexer_classes['none'](**opts)