i18n

frontend/public/locales/en-GB/translation.toml

@@ -4600,6 +4600,13 @@ label = "Generate table of contents in the merged file?"
 description = "Automatically creates a clickable table of contents in the merged PDF based on the original file names and page numbers."
 title = "Generate Table of Contents"
 
+[merge.preserveAccessibility]
+label = "Preserve accessibility tags? (uses more memory on large merges)"
+
+[merge.preserveAccessibility.tooltip]
+description = "Keeps PDF/UA structure tags (used by screen readers) in the merged output. Increases peak memory usage; leave off for large merges if accessibility is not required."
+title = "Preserve Accessibility Tags"
+
 [merge.removeDigitalSignature]
 label = "Remove digital signature in the merged file?"
 

frontend/src/core/components/tooltips/useMergeTips.tsx

@@ -29,6 +29,16 @@ export const useMergeTips = (): TooltipContent => {
           "Automatically creates a clickable table of contents in the merged PDF based on the original file names and page numbers.",
         ),
       },
+      {
+        title: t(
+          "merge.preserveAccessibility.tooltip.title",
+          "Preserve Accessibility Tags",
+        ),
+        description: t(
+          "merge.preserveAccessibility.tooltip.description",
+          "Keeps PDF/UA structure tags (used by screen readers) in the merged output. Increases peak memory usage; leave off for large merges if accessibility is not required.",
+        ),
+      },
     ],
   };
 };