diff -u b/core/modules/system/css/system.theme.css b/core/modules/system/css/system.theme.css
--- b/core/modules/system/css/system.theme.css
+++ b/core/modules/system/css/system.theme.css
@@ -89,7 +89,6 @@
   content: " \204E ";
   line-height: 1;
   vertical-align: super;
-  speak: none;
 }
 
 abbr.tabledrag-changed,