diff --git a/accessibility-checker-engine/help-v4/en-US/aria_application_label_unique.html b/accessibility-checker-engine/help-v4/en-US/aria_application_label_unique.html
index a27730a88..9ebc32c97 100644
--- a/accessibility-checker-engine/help-v4/en-US/aria_application_label_unique.html
+++ b/accessibility-checker-engine/help-v4/en-US/aria_application_label_unique.html
@@ -82,6 +82,7 @@ <h1 id="weather">Weather portlet</h1>
 * [IBM 2.4.1 Bypass Blocks](https://www.ibm.com/able/requirements/requirements/#2_4_1)
 * [ARIA6: aria-label to label objects](https://www.w3.org/WAI/WCAG22/Techniques/aria/ARIA6)
 * [ARIA13: aria-labelledby to name regions and landmarks](https://www.w3.org/WAI/WCAG22/Techniques/aria/ARIA13)
+* [ARIA specification - Application Role](https://www.w3.org/TR/wai-aria-1.2/#application)
 
 ### Who does this affect?
 
diff --git a/accessibility-checker-engine/help-v4/en-US/aria_application_labelled.html b/accessibility-checker-engine/help-v4/en-US/aria_application_labelled.html
index 843c1487c..45e18169c 100644
--- a/accessibility-checker-engine/help-v4/en-US/aria_application_labelled.html
+++ b/accessibility-checker-engine/help-v4/en-US/aria_application_labelled.html
@@ -79,6 +79,7 @@ <h1 id="weather">Weather portlet</h1>
 
 * [IBM 2.4.1 Bypass Blocks](https://www.ibm.com/able/requirements/requirements/#2_4_1)
 * [ARIA practices - Accessible Names and Descriptions](https://www.w3.org/WAI/ARIA/apg/practices/names-and-descriptions/)
+* [ARIA specification - Application Role](https://www.w3.org/TR/wai-aria-1.2/#application)
 
 ### Who does this affect?
 
diff --git a/accessibility-checker-engine/help-v4/en-US/aria_article_label_unique.html b/accessibility-checker-engine/help-v4/en-US/aria_article_label_unique.html
index 3a8dc7da8..72edce742 100644
--- a/accessibility-checker-engine/help-v4/en-US/aria_article_label_unique.html
+++ b/accessibility-checker-engine/help-v4/en-US/aria_article_label_unique.html
@@ -83,6 +83,7 @@ <h1 id="t1">Stock Ticker Portlet</h1">
 * [IBM 2.4.1 Bypass Blocks](https://www.ibm.com/able/requirements/requirements/#2_4_1)
 * [ARIA6: aria-label to label objects](https://www.w3.org/WAI/WCAG22/Techniques/aria/ARIA6)
 * [ARIA13: aria-labelledby to name regions and landmarks](https://www.w3.org/WAI/WCAG22/Techniques/aria/ARIA13)
+* [ARIA specification - Article Role](https://www.w3.org/TR/wai-aria-1.2/#article)
 
 ### Who does this affect?
 
diff --git a/accessibility-checker-engine/help-v4/en-US/aria_attribute_required.html b/accessibility-checker-engine/help-v4/en-US/aria_attribute_required.html
index 15c6ede5e..487d1d7da 100644
--- a/accessibility-checker-engine/help-v4/en-US/aria_attribute_required.html
+++ b/accessibility-checker-engine/help-v4/en-US/aria_attribute_required.html
@@ -84,6 +84,7 @@ <h3 id="ruleMessage"></h3>
 
 * [IBM 4.1.2 Name, Role, Value](https://www.ibm.com/able/requirements/requirements/#4_1_2)
 * [ARIA practices guide](https://www.w3.org/WAI/ARIA/apg/)
+* [ARIA specification](https://www.w3.org/TR/wai-aria-1.2/)]
 
 ### Who does this affect?
 
diff --git a/accessibility-checker-engine/help-v4/en-US/aria_banner_label_unique.html b/accessibility-checker-engine/help-v4/en-US/aria_banner_label_unique.html
index d22157c79..9c3208c4f 100644
--- a/accessibility-checker-engine/help-v4/en-US/aria_banner_label_unique.html
+++ b/accessibility-checker-engine/help-v4/en-US/aria_banner_label_unique.html
@@ -83,6 +83,7 @@ <h1 id="weather">Weather portlet</h1>
 * [IBM 2.4.1 Bypass Blocks](https://www.ibm.com/able/requirements/requirements/#2_4_1)
 * [ARIA6: aria-label to label objects](https://www.w3.org/WAI/WCAG22/Techniques/aria/ARIA6)
 * [ARIA13: aria-labelledby to name regions and landmarks](https://www.w3.org/WAI/WCAG22/Techniques/aria/ARIA13)
+* [ARIA specification - Banner Role](https://www.w3.org/TR/wai-aria-1.2/#banner)]
 
 ### Who does this affect?
 
diff --git a/accessibility-checker-engine/help-v4/en-US/aria_banner_single.html b/accessibility-checker-engine/help-v4/en-US/aria_banner_single.html
index facf0c030..ded0553f7 100644
--- a/accessibility-checker-engine/help-v4/en-US/aria_banner_single.html
+++ b/accessibility-checker-engine/help-v4/en-US/aria_banner_single.html
@@ -76,7 +76,8 @@ <h3 id="ruleMessage"></h3>
 ### About this requirement
 
 * [IBM 2.4.1 Bypass Blocks](https://www.ibm.com/able/requirements/requirements/#2_4_1)
-* [ARIA practices - HTML Sectioning Elements](https://www.w3.org/WAI/ARIA/apg/practices/landmark-regions/#htmlsectioningelements)
+* [ARIA practices - Landmark Regions](https://www.w3.org/WAI/ARIA/apg/practices/landmark-regions/)
+* [ARIA specification - Banner Role](https://www.w3.org/TR/wai-aria-1.2/#banner)]
 
 ### Who does this affect?
 
diff --git a/accessibility-checker-engine/help-v4/en-US/aria_complementary_label_unique.html b/accessibility-checker-engine/help-v4/en-US/aria_complementary_label_unique.html
index 1867efa1d..61ebe6ef9 100644
--- a/accessibility-checker-engine/help-v4/en-US/aria_complementary_label_unique.html
+++ b/accessibility-checker-engine/help-v4/en-US/aria_complementary_label_unique.html
@@ -82,6 +82,7 @@ <h2 id="weather">Weather portlet</h2>
 * [IBM 2.4.1 Bypass Blocks](https://www.ibm.com/able/requirements/requirements/#2_4_1)
 * [ARIA6: aria-label to label objects](https://www.w3.org/WAI/WCAG22/Techniques/aria/ARIA6)
 * [ARIA13: aria-labelledby to name regions and landmarks](https://www.w3.org/WAI/WCAG22/Techniques/aria/ARIA13)
+* [ARIA specification - Complementary Role](https://www.w3.org/TR/wai-aria-1.2/#complementary)
 
 ### Who does this affect?
 
diff --git a/accessibility-checker-engine/help-v4/en-US/aria_complementary_label_visible.html b/accessibility-checker-engine/help-v4/en-US/aria_complementary_label_visible.html
index 777148ff5..7605e3a5e 100644
--- a/accessibility-checker-engine/help-v4/en-US/aria_complementary_label_visible.html
+++ b/accessibility-checker-engine/help-v4/en-US/aria_complementary_label_visible.html
@@ -79,6 +79,7 @@ <h1 id="weather">Weather portlet</h1>
 * [IBM 2.4.1 Bypass Blocks](https://www.ibm.com/able/requirements/requirements/#2_4_1)
 * [ARIA specification - complementary role](https://www.w3.org/TR/wai-aria-1.2/#complementary)
 * [ARIA practices - Landmark Regions](https://www.w3.org/WAI/ARIA/apg/practices/landmark-regions/)
+* [ARIA specification - Complementary Role](https://www.w3.org/TR/wai-aria-1.2/#complementary)
 
 ### Who does this affect?
 
diff --git a/accessibility-checker-engine/help-v4/en-US/aria_contentinfo_label_unique.html b/accessibility-checker-engine/help-v4/en-US/aria_contentinfo_label_unique.html
index 9b47d704e..afdffc649 100644
--- a/accessibility-checker-engine/help-v4/en-US/aria_contentinfo_label_unique.html
+++ b/accessibility-checker-engine/help-v4/en-US/aria_contentinfo_label_unique.html
@@ -44,7 +44,10 @@ <h3 id="ruleMessage"></h3>
 <mark-down><script type="text/plain">
 
 ### Why is this important?
-When there are multiple elements with a `"contentinfo"` role, they must have unique labels that clearly describe each region's content. This includes HTML `<footer>` elements when their context is a `<body>` element. These labels help people using assistive technologies to quickly find and navigate to each region.
+
+When there are multiple elements with a `"contentinfo"` role, they must have unique labels that clearly describe each region's content. 
+This includes HTML `<footer>` elements when their context is a `<body>` element. 
+These labels help people using assistive technologies to quickly find and navigate to each region.
 
 <!-- This is where the code snippet is injected -->
 <div id="locSnippet"></div>
@@ -80,6 +83,7 @@ <h3 id="ruleMessage"></h3>
 * [IBM 2.4.1 Bypass Blocks](https://www.ibm.com/able/requirements/requirements/#2_4_1)
 * [ARIA6: aria-label to label objects](https://www.w3.org/WAI/WCAG22/Techniques/aria/ARIA6)
 * [ARIA13: aria-labelledby to name regions and landmarks](https://www.w3.org/WAI/WCAG22/Techniques/aria/ARIA13)
+* [ARIA specification - Contentinfo Role](https://www.w3.org/TR/wai-aria-1.2/#contentinfo)
 
 ### Who does this affect?
 
diff --git a/accessibility-checker-engine/help-v4/en-US/aria_document_label_unique.html b/accessibility-checker-engine/help-v4/en-US/aria_document_label_unique.html
index 19abc1d9f..ca4fa0386 100644
--- a/accessibility-checker-engine/help-v4/en-US/aria_document_label_unique.html
+++ b/accessibility-checker-engine/help-v4/en-US/aria_document_label_unique.html
@@ -70,6 +70,7 @@ <h3 id="ruleMessage"></h3>
 * [IBM 2.4.1 Bypass Blocks](https://www.ibm.com/able/requirements/requirements/#2_4_1)
 * [ARIA6: aria-label to label objects](https://www.w3.org/WAI/WCAG22/Techniques/aria/ARIA6.html)
 * [ARIA13: aria-labelledby to name regions and landmarks](https://www.w3.org/WAI/WCAG22/Techniques/aria/ARIA13)
+* [ARIA specification - Document Role](https://www.w3.org/TR/wai-aria-1.2/#document)]
 
 ### Who does this affect?
 
diff --git a/accessibility-checker-engine/help-v4/en-US/aria_form_label_unique.html b/accessibility-checker-engine/help-v4/en-US/aria_form_label_unique.html
index 85e9f987b..a0465266f 100644
--- a/accessibility-checker-engine/help-v4/en-US/aria_form_label_unique.html
+++ b/accessibility-checker-engine/help-v4/en-US/aria_form_label_unique.html
@@ -91,6 +91,7 @@ <h2 id="na1"> New Account</h2>
 * [IBM 2.4.1 Bypass Blocks](https://www.ibm.com/able/requirements/requirements/#2_4_1)
 * [ARIA6: aria-label to label objects](https://www.w3.org/WAI/WCAG22/Techniques/aria/ARIA6)
 * [ARIA13: aria-labelledby to name regions and landmarks](https://www.w3.org/WAI/WCAG22/Techniques/aria/ARIA13)
+* [ARIA specification - Form Role](https://www.w3.org/TR/wai-aria-1.2/#form)
 
 ### Who does this affect?
 
diff --git a/accessibility-checker-engine/help-v4/en-US/aria_landmark_name_unique.html b/accessibility-checker-engine/help-v4/en-US/aria_landmark_name_unique.html
index 7e497b5d8..4a013bfed 100644
--- a/accessibility-checker-engine/help-v4/en-US/aria_landmark_name_unique.html
+++ b/accessibility-checker-engine/help-v4/en-US/aria_landmark_name_unique.html
@@ -87,6 +87,7 @@ <h3 id="ruleMessage"></h3>
 * [IBM 1.3.1 Info and relationships](https://www.ibm.com/able/requirements/requirements/#1_3_1)
 * [ARIA11: ARIA landmarks to identify regions of a page](https://www.w3.org/WAI/WCAG22/Techniques/aria/ARIA11)
 * [ARIA13: aria-labelledby to name regions and landmarks](https://www.w3.org/WAI/WCAG22/Techniques/aria/ARIA13)
+* [ARIA specification - Landmark Role](https://www.w3.org/TR/wai-aria-1.2/#landmark)
 
 ### Who does this affect?
 
diff --git a/accessibility-checker-engine/help-v4/en-US/aria_main_label_unique.html b/accessibility-checker-engine/help-v4/en-US/aria_main_label_unique.html
index 443614da2..6be02b467 100644
--- a/accessibility-checker-engine/help-v4/en-US/aria_main_label_unique.html
+++ b/accessibility-checker-engine/help-v4/en-US/aria_main_label_unique.html
@@ -88,7 +88,7 @@ <h1 id="title1"> Stock Ticker portlet </h1>
 ### About this requirement
 
 * [IBM 2.4.1 Bypass Blocks](https://www.ibm.com/able/requirements/requirements/#2_4_1)
-* [ARIA specification - Main](https://www.w3.org/TR/wai-aria-1.2/#main)
+* [ARIA specification - Main Role](https://www.w3.org/TR/wai-aria-1.2/#main)
 * [ARIA practices - Landmark Regions](https://www.w3.org/WAI/ARIA/apg/practices/landmark-regions/)
 
 ### Who does this affect?
diff --git a/accessibility-checker-engine/help-v4/en-US/aria_main_label_visible.html b/accessibility-checker-engine/help-v4/en-US/aria_main_label_visible.html
index 48f605673..3691b7dbe 100644
--- a/accessibility-checker-engine/help-v4/en-US/aria_main_label_visible.html
+++ b/accessibility-checker-engine/help-v4/en-US/aria_main_label_visible.html
@@ -81,6 +81,7 @@ <h1 id="stocks">Stock ticker portlet</h1>
 ### About this requirement
 
 * [IBM 2.4.1 Bypass Blocks](https://www.ibm.com/able/requirements/requirements/#2_4_1)
+* [ARIA specification - Main Role](https://www.w3.org/TR/wai-aria-1.2/#main)
 
 ### Who does this affect?
 
diff --git a/accessibility-checker-engine/help-v4/en-US/aria_navigation_label_unique.html b/accessibility-checker-engine/help-v4/en-US/aria_navigation_label_unique.html
index a979aa8e2..4af655079 100644
--- a/accessibility-checker-engine/help-v4/en-US/aria_navigation_label_unique.html
+++ b/accessibility-checker-engine/help-v4/en-US/aria_navigation_label_unique.html
@@ -84,6 +84,7 @@ <h2 id="weather">Weather portlet</h2>
 * [IBM 2.4.1 Bypass Blocks](https://www.ibm.com/able/requirements/requirements/#2_4_1)
 * [ARIA6: aria-label to label objects](https://www.w3.org/WAI/WCAG22/Techniques/aria/ARIA6)
 * [ARIA13: aria-labelledby to name regions and landmarks](https://www.w3.org/WAI/WCAG22/Techniques/aria/ARIA13)
+* [ARIA specification - Navigation Role](https://www.w3.org/TR/wai-aria-1.2/#navigation)
 
 ### Who does this affect?
 
diff --git a/accessibility-checker-engine/help-v4/en-US/aria_region_label_unique.html b/accessibility-checker-engine/help-v4/en-US/aria_region_label_unique.html
index 1d440fe21..990ef9a5f 100644
--- a/accessibility-checker-engine/help-v4/en-US/aria_region_label_unique.html
+++ b/accessibility-checker-engine/help-v4/en-US/aria_region_label_unique.html
@@ -81,6 +81,7 @@ <h3 id="ruleMessage"></h3>
 * [IBM 2.4.1 Bypass Blocks](https://www.ibm.com/able/requirements/requirements/#2_4_1)
 * [ARIA6: aria-label to label objects](https://www.w3.org/WAI/WCAG22/Techniques/aria/ARIA6)
 * [ARIA13: aria-labelledby to name regions and landmarks](https://www.w3.org/WAI/WCAG22/Techniques/aria/ARIA13)
+* [ARIA specification - Region Role](https://www.w3.org/TR/wai-aria-1.2/#region)
 
 ### Who does this affect?
 
diff --git a/accessibility-checker-engine/help-v4/en-US/aria_region_labelled.html b/accessibility-checker-engine/help-v4/en-US/aria_region_labelled.html
index e65bd9804..63142a88b 100644
--- a/accessibility-checker-engine/help-v4/en-US/aria_region_labelled.html
+++ b/accessibility-checker-engine/help-v4/en-US/aria_region_labelled.html
@@ -78,7 +78,8 @@ <h3 id="log1">Real time log</h3>
 
 * [IBM 2.4.1 Bypass Blocks](https://www.ibm.com/able/requirements/requirements/#2_4_1)
 * [ARIA practices - Landmark Regions](https://www.w3.org/WAI/ARIA/apg/practices/landmark-regions/)
-* [ARIA examples - Region Landmark](https://www.w3.org/WAI/ARIA/apg/patterns/landmarks/examples/region.html)
+* [ARIA specification - Region Role](https://www.w3.org/TR/wai-aria-1.2/#region)
+
 
 ### Who does this affect?
 
diff --git a/accessibility-checker-engine/help-v4/en-US/aria_search_label_unique.html b/accessibility-checker-engine/help-v4/en-US/aria_search_label_unique.html
index 20e12954e..0de186911 100644
--- a/accessibility-checker-engine/help-v4/en-US/aria_search_label_unique.html
+++ b/accessibility-checker-engine/help-v4/en-US/aria_search_label_unique.html
@@ -80,6 +80,7 @@ <h3 id="ruleMessage"></h3>
 * [IBM 2.4.1 Bypass Blocks](https://www.ibm.com/able/requirements/requirements/#2_4_1)
 * [ARIA6: aria-label to label objects](https://www.w3.org/WAI/WCAG22/Techniques/aria/ARIA6)
 * [ARIA13: aria-labelledby to name regions and landmarks](https://www.w3.org/WAI/WCAG22/Techniques/aria/ARIA13)
+* [ARIA specification - Search Role](https://www.w3.org/TR/wai-aria-1.2/#search)
 
 ### Who does this affect?
 * People using a screen reader, including blind, low vision, and neurodivergent people
diff --git a/accessibility-checker-engine/help-v4/en-US/aria_toolbar_label_unique.html b/accessibility-checker-engine/help-v4/en-US/aria_toolbar_label_unique.html
index fed43c1e9..b93fd2003 100644
--- a/accessibility-checker-engine/help-v4/en-US/aria_toolbar_label_unique.html
+++ b/accessibility-checker-engine/help-v4/en-US/aria_toolbar_label_unique.html
@@ -79,8 +79,9 @@ <h2 id="ct">Complex tools</h2>
 
 ### About this requirement
 
-* [IBM 4.1.2 Name, Role, Value](https://www.ibm.com/able/requirements/requirements/#4_1_2)
+* [IBM 2.4.1 Bypass Blocks](https://www.ibm.com/able/requirements/requirements/#2_4_1)
 * [ARIA16: aria-labelledby to name user interface controls](https://www.w3.org/WAI/WCAG22/Techniques/aria/ARIA16)
+* [ARIA specification - Toolbar Role](https://www.w3.org/TR/wai-aria-1.2/#toolbar)
 
 ### Who does this affect?
 
diff --git a/accessibility-checker-engine/src/v4/rules/aria_application_labelled.ts b/accessibility-checker-engine/src/v4/rules/aria_application_labelled.ts
index 0ea713c28..4bdc379a2 100644
--- a/accessibility-checker-engine/src/v4/rules/aria_application_labelled.ts
+++ b/accessibility-checker-engine/src/v4/rules/aria_application_labelled.ts
@@ -34,8 +34,8 @@ export let aria_application_labelled: Rule = {
     messages: {
         "en-US": {
             "Pass_0": "Rule Passed",
-            "Fail_1": "Element with \"application\" role does not have an accessible name",
-            "group": "An element with \"application\" role must have an accessible name that describes its purpose"
+            "Fail_1": "Element with \"application\" role does not have a label",
+            "group": "Each element with \"application\" role must have a label that describes its purpose"
         }
     },
     rulesets: [{
diff --git a/accessibility-checker-engine/src/v4/rules/aria_attribute_required.ts b/accessibility-checker-engine/src/v4/rules/aria_attribute_required.ts
index fd3fec72e..cd6f62443 100644
--- a/accessibility-checker-engine/src/v4/rules/aria_attribute_required.ts
+++ b/accessibility-checker-engine/src/v4/rules/aria_attribute_required.ts
@@ -37,7 +37,7 @@ export let aria_attribute_required: Rule = {
         "en-US": {
             "group": "The required attributes for the element with a role must be defined",
             "pass": "The required attributes for the element with the role are defined",
-            "fail_missing": "An element with ARIA role '{0}' does not have the required ARIA attribute(s): '{1}'"
+            "fail_missing": "Element with '{0}' role does not have the required ARIA attribute(s): '{1}'"
         }
     },
     rulesets: [{
diff --git a/accessibility-checker-engine/src/v4/rules/aria_banner_single.ts b/accessibility-checker-engine/src/v4/rules/aria_banner_single.ts
index 65b1e4105..8f1f26ade 100644
--- a/accessibility-checker-engine/src/v4/rules/aria_banner_single.ts
+++ b/accessibility-checker-engine/src/v4/rules/aria_banner_single.ts
@@ -33,8 +33,8 @@ export let aria_banner_single: Rule = {
     messages: {
         "en-US": {
             "Pass_0": "Rule Passed",
-            "Fail_1": "There is more than one element with \"banner\" role on the page",
-            "group": "There must be only one element with \"banner\" role on the page"
+            "Fail_1": "Multiple elements with \"banner\" role found on the page",
+            "group": "A page, document, or application should only have one element with \"banner\" role"
         }
     },
     rulesets: [{
diff --git a/accessibility-checker-engine/src/v4/rules/aria_complementary_label_visible.ts b/accessibility-checker-engine/src/v4/rules/aria_complementary_label_visible.ts
index 29996d76d..82110443c 100644
--- a/accessibility-checker-engine/src/v4/rules/aria_complementary_label_visible.ts
+++ b/accessibility-checker-engine/src/v4/rules/aria_complementary_label_visible.ts
@@ -34,7 +34,7 @@ export let aria_complementary_label_visible: Rule = {
     messages: {
         "en-US": {
             "Pass_0": "Rule Passed",
-            "Fail_1": "The element with \"complementary\" role does not have a visible label",
+            "Fail_1": "Element with \"complementary\" role does not have a visible label",
             "group": "Each element with \"complementary\" role should have a visible label that describes its purpose"
         }
     },
diff --git a/accessibility-checker-engine/src/v4/rules/aria_complementary_labelled.ts b/accessibility-checker-engine/src/v4/rules/aria_complementary_labelled.ts
index d6d1bef83..2138e2689 100644
--- a/accessibility-checker-engine/src/v4/rules/aria_complementary_labelled.ts
+++ b/accessibility-checker-engine/src/v4/rules/aria_complementary_labelled.ts
@@ -34,8 +34,8 @@ export let aria_complementary_labelled: Rule = {
     messages: {
         "en-US": {
             "Pass_0": "Rule Passed",
-            "Fail_1": "The element with \"complementary\" role does not have an accessible name",
-            "group": "An element with \"complementary\" role must have an accessible name"
+            "Fail_1": "Element with \"complementary\" role does not have a label",
+            "group": "Each element with \"complementary\" role must have a label that describes its purpose"
         }
     },
     rulesets: [{
diff --git a/accessibility-checker-engine/src/v4/rules/aria_contentinfo_misuse.ts b/accessibility-checker-engine/src/v4/rules/aria_contentinfo_misuse.ts
index 137811bee..432a3049f 100644
--- a/accessibility-checker-engine/src/v4/rules/aria_contentinfo_misuse.ts
+++ b/accessibility-checker-engine/src/v4/rules/aria_contentinfo_misuse.ts
@@ -34,8 +34,8 @@ export let aria_contentinfo_misuse: Rule = {
     messages: {
         "en-US": {
             "Pass_0": "Rule Passed",
-            "Fail_1": "The element with \"contentinfo\" role is present without an element with \"main\" role",
-            "group": "An element with \"contentinfo\" role is only permitted with an element with \"main\" role"
+            "Fail_1": "Element with \"contentinfo\" role is present without an element with \"main\" role",
+            "group": "Each element with \"contentinfo\" role is only permitted with an element with \"main\" role"
         }
     },
     rulesets: [{
diff --git a/accessibility-checker-engine/src/v4/rules/aria_contentinfo_single.ts b/accessibility-checker-engine/src/v4/rules/aria_contentinfo_single.ts
index 4058938f8..946fca5fd 100644
--- a/accessibility-checker-engine/src/v4/rules/aria_contentinfo_single.ts
+++ b/accessibility-checker-engine/src/v4/rules/aria_contentinfo_single.ts
@@ -33,8 +33,8 @@ export let aria_contentinfo_single: Rule = {
     messages: {
         "en-US": {
             "Pass_0": "Rule Passed",
-            "Fail_1": "Multiple elements with \"contentinfo\" role found on a page",
-            "group": "A page, document or application should only have one element with \"contentinfo\" role"
+            "Fail_1": "Multiple elements with \"contentinfo\" role found on the page",
+            "group": "A page, document, or application should only have one element with \"contentinfo\" role"
         }
     },
     rulesets: [{
diff --git a/accessibility-checker-engine/src/v4/rules/aria_document_label_unique.ts b/accessibility-checker-engine/src/v4/rules/aria_document_label_unique.ts
index fea91ce83..ae002c332 100644
--- a/accessibility-checker-engine/src/v4/rules/aria_document_label_unique.ts
+++ b/accessibility-checker-engine/src/v4/rules/aria_document_label_unique.ts
@@ -34,8 +34,8 @@ export let aria_document_label_unique: Rule = {
     messages: {
         "en-US": {
             "Pass_0": "Rule Passed",
-            "Fail_1": "Multiple elements with a \"document\" role do not have unique labels",
-            "group": "All elements with a \"document\" role must have unique labels"
+            "Fail_1": "Multiple elements with \"document\" roles do not have unique labels",
+            "group": "Each element with \"document\" role must have a unique label that describes its purpose"
         }
     },
     rulesets: [{
diff --git a/accessibility-checker-engine/src/v4/rules/aria_landmark_name_unique.ts b/accessibility-checker-engine/src/v4/rules/aria_landmark_name_unique.ts
index 59882a4f5..f684ab3ef 100644
--- a/accessibility-checker-engine/src/v4/rules/aria_landmark_name_unique.ts
+++ b/accessibility-checker-engine/src/v4/rules/aria_landmark_name_unique.ts
@@ -35,20 +35,20 @@ export let aria_landmark_name_unique: Rule = {
     },
     messages: {
         "en-US": {
-            "Pass_0": "Multiple \"{0}\" landmarks with the same parent region are distinguished by unique 'aria-label' or 'aria-labelledby'",
-            "Fail_0": "Multiple \"{0}\" landmarks with the same parent region are not distinguished from one another because they have the same \"{1}\" label",
-            "group": "Multiple landmarks should have a unique 'aria-labelledby' or 'aria-label' or be nested in a different parent regions"
+            "Pass_0": "Multiple elements with \"{0}\" landmarks within the same parent region are distinguished by unique 'aria-label' or 'aria-labelledby'",
+            "Fail_0": "Multiple elements with \"{0}\" landmarks within the same parent region are not distinguished from one another because they have the same \"{1}\" label",
+            "group": "Each landmark should have a unique 'aria-labelledby' or 'aria-label' or be nested in a different parent region"
         }
     },
     rulesets: [{
         "id": ["IBM_Accessibility", "IBM_Accessibility_next"],
-        "num": ["1.3.1"],
+        "num": ["2.4.1"], //remapped to 2.4.1 to be consistent with all landmark region rules
         "level": eRulePolicy.VIOLATION,
         "toolkitLevel": eToolkitLevel.LEVEL_THREE
     },
     {
         "id": ["WCAG_2_1", "WCAG_2_0", "WCAG_2_2"],
-        "num": ["1.3.1"],
+        "num": ["2.4.1"],
         "level": eRulePolicy.RECOMMENDATION,
         "toolkitLevel": eToolkitLevel.LEVEL_THREE
     }],
diff --git a/accessibility-checker-engine/src/v4/rules/aria_main_label_unique.ts b/accessibility-checker-engine/src/v4/rules/aria_main_label_unique.ts
index 25424ca8b..dd7b9b5b0 100644
--- a/accessibility-checker-engine/src/v4/rules/aria_main_label_unique.ts
+++ b/accessibility-checker-engine/src/v4/rules/aria_main_label_unique.ts
@@ -34,7 +34,7 @@ export let aria_main_label_unique: Rule = {
         "en-US": {
             "Pass_0": "Rule Passed",
             "Fail_1": "Multiple elements with \"main\" role do not have unique labels",
-            "group": "Elements with \"main\" role must have unique labels"
+            "group": "Each element with \"main\" role must have unique label that describes its purposes"
         }
     },
     rulesets: [{
diff --git a/accessibility-checker-engine/src/v4/rules/aria_parent_required.ts b/accessibility-checker-engine/src/v4/rules/aria_parent_required.ts
index 4020567e2..6f1539b86 100644
--- a/accessibility-checker-engine/src/v4/rules/aria_parent_required.ts
+++ b/accessibility-checker-engine/src/v4/rules/aria_parent_required.ts
@@ -36,9 +36,9 @@ export let aria_parent_required: Rule = {
     },
     messages: {
         "en-US": {
-            "group": "An element with an implicit or explicit role must be contained within a valid element",
+            "group": "Each element with an implicit or explicit role must be contained within a valid element",
             "Pass_0": "Rule Passed",
-            "Fail_1": "The element with role \"{0}\" is not contained in or owned by an element with one of the following roles: \"{1}\""
+            "Fail_1": "Element with \"{0}\" role is not contained in or owned by an element with one of the following roles: \"{1}\""
         }
     },
     rulesets: [{
diff --git a/accessibility-checker-engine/src/v4/rules/aria_region_label_unique.ts b/accessibility-checker-engine/src/v4/rules/aria_region_label_unique.ts
index 7603daf49..ae667a198 100644
--- a/accessibility-checker-engine/src/v4/rules/aria_region_label_unique.ts
+++ b/accessibility-checker-engine/src/v4/rules/aria_region_label_unique.ts
@@ -35,7 +35,7 @@ export let aria_region_label_unique: Rule = {
         "en-US": {
             "Pass_0": "Rule Passed",
             "Fail_1": "Multiple elements with \"region\" role do not have unique labels",
-            "group": "Each element with a \"region\" role must have a unique label"
+            "group": "Each element with \"region\" role must have a unique label that describes its purpose"
         }
     },
     rulesets: [{
diff --git a/accessibility-checker-engine/src/v4/rules/aria_region_labelled.ts b/accessibility-checker-engine/src/v4/rules/aria_region_labelled.ts
index e32e763c9..408d71008 100644
--- a/accessibility-checker-engine/src/v4/rules/aria_region_labelled.ts
+++ b/accessibility-checker-engine/src/v4/rules/aria_region_labelled.ts
@@ -36,9 +36,9 @@ export let aria_region_labelled: Rule = {
     messages: {
         "en-US": {
             "Pass_0": "Rule Passed",
-            "Fail_1": "Element with a \"region\" role does not have an accessible name",
-            "Fail_2": "The element with \"region\" role is not labeled with an 'aria-label' or 'aria-labelledby'",
-            "group": "Each element with \"region\" role must have an accessible name that describes its purpose"
+            "Fail_1": "Element with \"region\" role does not have a label",
+            "Fail_2": "Element with \"region\" role is not labeled with 'aria-label' or 'aria-labelledby'",
+            "group": "Each element with \"region\" role must have a label that describes its purpose"
         }
     },
     rulesets: [{
diff --git a/accessibility-checker-engine/src/v4/rules/aria_toolbar_label_unique.ts b/accessibility-checker-engine/src/v4/rules/aria_toolbar_label_unique.ts
index 729c8ed10..d602f27b1 100644
--- a/accessibility-checker-engine/src/v4/rules/aria_toolbar_label_unique.ts
+++ b/accessibility-checker-engine/src/v4/rules/aria_toolbar_label_unique.ts
@@ -34,13 +34,13 @@ export let aria_toolbar_label_unique: Rule = {
     messages: {
         "en-US": {
             "Pass_0": "Rule Passed",
-            "Fail_1": "Multiple toolbar components do not have unique labels",
-            "group": "All toolbar components on a page must have unique labels specified"
+            "Fail_1": "Multiple elements with \"toolbar\" roles do not have unique labels",
+            "group": "Each element with \"toolbar\" role must have a unique label that describes its purpose"
         }
     },
     rulesets: [{
         "id": ["IBM_Accessibility", "IBM_Accessibility_next", "WCAG_2_1", "WCAG_2_0", "WCAG_2_2"],
-        "num": ["4.1.2"],
+        "num": ["2.4.1"], //updated mapping to match other landmark regions rules
         "level": eRulePolicy.VIOLATION,
         "toolkitLevel": eToolkitLevel.LEVEL_ONE
     }],
diff --git a/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_attribute_required_ruleunit/separator.html b/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_attribute_required_ruleunit/separator.html
index 3651a14e5..bf2f6fd4f 100644
--- a/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_attribute_required_ruleunit/separator.html
+++ b/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_attribute_required_ruleunit/separator.html
@@ -82,7 +82,7 @@ <h3>WAI-ARIA role valid attribute test</h3>
               "aria": "/document[1]/separator[3]"
             },
             "reasonId": "fail_missing",
-            "message": "An element with ARIA role 'separator' does not have the required ARIA attribute(s): 'aria-valuenow'",
+            "message": "Element with 'separator' role does not have the required ARIA attribute(s): 'aria-valuenow'",
             "messageArgs": [
               "separator",
               "aria-valuenow"
diff --git a/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_landmark_name_unique_ruleunit/example_0_fail.html b/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_landmark_name_unique_ruleunit/example_0_fail.html
index 82f558c87..094382093 100755
--- a/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_landmark_name_unique_ruleunit/example_0_fail.html
+++ b/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_landmark_name_unique_ruleunit/example_0_fail.html
@@ -55,7 +55,7 @@ <h2 id="rightnavheading">Institutional Links</h2>
           "aria": "/document[1]/main[1]/navigation[1]"
         },
         "reasonId": "Fail_0",
-        "message": "Multiple \"navigation\" landmarks with the same parent region are not distinguished from one another because they have the same \"Institutional Links\" label", 
+        "message": "Multiple elements with \"navigation\" landmarks within the same parent region are not distinguished from one another because they have the same \"Institutional Links\" label", 
         "messageArgs": [
           "navigation",
           "Institutional Links"
@@ -74,7 +74,7 @@ <h2 id="rightnavheading">Institutional Links</h2>
           "aria": "/document[1]/main[1]/navigation[2]"
         },
         "reasonId": "Fail_0",
-        "message": "Multiple \"navigation\" landmarks with the same parent region are not distinguished from one another because they have the same \"Institutional Links\" label",
+        "message": "Multiple elements with \"navigation\" landmarks within the same parent region are not distinguished from one another because they have the same \"Institutional Links\" label",
         "messageArgs": [
           "navigation",
           "Institutional Links"
diff --git a/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_landmark_name_unique_ruleunit/example_0_pass.html b/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_landmark_name_unique_ruleunit/example_0_pass.html
index 66548d237..fe5f1300a 100755
--- a/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_landmark_name_unique_ruleunit/example_0_pass.html
+++ b/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_landmark_name_unique_ruleunit/example_0_pass.html
@@ -58,7 +58,7 @@ <h2 id="rightnavheading">Related topics</h2>
             "aria": "/document[1]/main[1]/navigation[1]"
           },
           "reasonId": "Pass_0",
-          "message": "Multiple \"navigation\" landmarks with the same parent region are distinguished by unique 'aria-label' or 'aria-labelledby'",
+          "message": "Multiple elements with \"navigation\" landmarks within the same parent region are distinguished by unique 'aria-label' or 'aria-labelledby'",
           "messageArgs": [
             "navigation"
           ],
@@ -76,7 +76,7 @@ <h2 id="rightnavheading">Related topics</h2>
             "aria": "/document[1]/main[1]/navigation[2]"
           },
           "reasonId": "Pass_0",
-          "message": "Multiple \"navigation\" landmarks with the same parent region are distinguished by unique 'aria-label' or 'aria-labelledby'",
+          "message": "Multiple elements with \"navigation\" landmarks within the same parent region are distinguished by unique 'aria-label' or 'aria-labelledby'",
           "messageArgs": [
             "navigation"
           ],
diff --git a/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_landmark_name_unique_ruleunit/example_2_fail.html b/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_landmark_name_unique_ruleunit/example_2_fail.html
index 4d206d21b..9d8877c55 100755
--- a/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_landmark_name_unique_ruleunit/example_2_fail.html
+++ b/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_landmark_name_unique_ruleunit/example_2_fail.html
@@ -59,7 +59,7 @@ <h2 id="rightnavheading">Related topics</h2>
 							"aria": "/document[1]/main[1]/navigation[1]"
 						},
 						"reasonId": "Fail_0",
-						"message": "Multiple \"navigation\" landmarks with the same parent region are not distinguished from one another because they have the same \"\" label",
+						"message": "Multiple elements with \"navigation\" landmarks within the same parent region are not distinguished from one another because they have the same \"\" label",
 						"messageArgs": [
 							"navigation",
 							""
@@ -78,7 +78,7 @@ <h2 id="rightnavheading">Related topics</h2>
 							"aria": "/document[1]/main[1]/application[1]/navigation[1]"
 						},
 						"reasonId": "Fail_0",
-						"message": "Multiple \"navigation\" landmarks with the same parent region are not distinguished from one another because they have the same \"\" label",
+						"message": "Multiple elements with \"navigation\" landmarks within the same parent region are not distinguished from one another because they have the same \"\" label",
 						"messageArgs": [
 							"navigation",
 							""
diff --git a/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_landmark_name_unique_ruleunit/example_3_pass.html b/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_landmark_name_unique_ruleunit/example_3_pass.html
index 80b685a2c..a40520bd0 100755
--- a/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_landmark_name_unique_ruleunit/example_3_pass.html
+++ b/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_landmark_name_unique_ruleunit/example_3_pass.html
@@ -57,7 +57,7 @@ <h2 id="rightnavheading">Related topics</h2>
 							"aria": "/document[1]/main[1]/navigation[1]"
 						},
 						"reasonId": "Pass_0",
-						"message": "Multiple \"navigation\" landmarks with the same parent region are distinguished by unique 'aria-label' or 'aria-labelledby'",
+						"message": "Multiple elements with \"navigation\" landmarks within the same parent region are distinguished by unique 'aria-label' or 'aria-labelledby'",
 						"messageArgs": [
 							"navigation"
 						],
@@ -75,7 +75,7 @@ <h2 id="rightnavheading">Related topics</h2>
 							"aria": "/document[1]/main[1]/navigation[2]"
 						},
 						"reasonId": "Pass_0",
-						"message": "Multiple \"navigation\" landmarks with the same parent region are distinguished by unique 'aria-label' or 'aria-labelledby'",
+						"message": "Multiple elements with \"navigation\" landmarks within the same parent region are distinguished by unique 'aria-label' or 'aria-labelledby'",
 						"messageArgs": [
 							"navigation"
 						],
diff --git a/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_landmark_name_unique_ruleunit/example_4_mixed.html b/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_landmark_name_unique_ruleunit/example_4_mixed.html
index 7b223bd3e..66ac6266d 100755
--- a/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_landmark_name_unique_ruleunit/example_4_mixed.html
+++ b/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_landmark_name_unique_ruleunit/example_4_mixed.html
@@ -107,7 +107,7 @@
             "aria": "/document[1]/complementary[1]"
           },
           "reasonId": "Pass_0",
-          "message": "Multiple \"complementary\" landmarks with the same parent region are distinguished by unique 'aria-label' or 'aria-labelledby'",
+          "message": "Multiple elements with \"complementary\" landmarks within the same parent region are distinguished by unique 'aria-label' or 'aria-labelledby'",
           "messageArgs": [
             "complementary"
           ],
@@ -125,7 +125,7 @@
             "aria": "/document[1]/complementary[2]"
           },
           "reasonId": "Pass_0",
-          "message": "Multiple \"complementary\" landmarks with the same parent region are distinguished by unique 'aria-label' or 'aria-labelledby'",
+          "message": "Multiple elements with \"complementary\" landmarks within the same parent region are distinguished by unique 'aria-label' or 'aria-labelledby'",
           "messageArgs": [
             "complementary"
           ],
@@ -143,7 +143,7 @@
             "aria": "/document[1]/complementary[3]"
           },
           "reasonId": "Pass_0",
-          "message": "Multiple \"complementary\" landmarks with the same parent region are distinguished by unique 'aria-label' or 'aria-labelledby'",
+          "message": "Multiple elements with \"complementary\" landmarks within the same parent region are distinguished by unique 'aria-label' or 'aria-labelledby'",
           "messageArgs": [
             "complementary"
           ],
@@ -161,7 +161,7 @@
             "aria": "/document[1]/region[1]"
           },
           "reasonId": "Fail_0",
-          "message": "Multiple \"region\" landmarks with the same parent region are not distinguished from one another because they have the same \"region FAIL\" label",
+          "message": "Multiple elements with \"region\" landmarks within the same parent region are not distinguished from one another because they have the same \"region FAIL\" label",
           "messageArgs": [
             "region",
             "region FAIL"
@@ -180,7 +180,7 @@
             "aria": "/document[1]/region[2]"
           },
           "reasonId": "Fail_0",
-          "message": "Multiple \"region\" landmarks with the same parent region are not distinguished from one another because they have the same \"region FAIL\" label",
+          "message": "Multiple elements with \"region\" landmarks within the same parent region are not distinguished from one another because they have the same \"region FAIL\" label",
           "messageArgs": [
             "region",
             "region FAIL"
@@ -199,7 +199,7 @@
             "aria": "/document[1]/region[3]"
           },
           "reasonId": "Fail_0",
-          "message": "Multiple \"region\" landmarks with the same parent region are not distinguished from one another because they have the same \"region FAIL\" label",
+          "message": "Multiple elements with \"region\" landmarks within the same parent region are not distinguished from one another because they have the same \"region FAIL\" label",
           "messageArgs": [
             "region",
             "region FAIL"
@@ -218,7 +218,7 @@
             "aria": "/document[1]/main[1]"
           },
           "reasonId": "Fail_0",
-          "message": "Multiple \"main\" landmarks with the same parent region are not distinguished from one another because they have the same \"\" label",
+          "message": "Multiple elements with \"main\" landmarks within the same parent region are not distinguished from one another because they have the same \"\" label",
           "messageArgs": [
             "main",
             ""
@@ -237,7 +237,7 @@
             "aria": "/document[1]/main[2]"
           },
           "reasonId": "Fail_0",
-          "message": "Multiple \"main\" landmarks with the same parent region are not distinguished from one another because they have the same \"\" label",
+          "message": "Multiple elements with \"main\" landmarks within the same parent region are not distinguished from one another because they have the same \"\" label",
           "messageArgs": [
             "main",
             ""
@@ -256,7 +256,7 @@
             "aria": "/document[1]/main[2]/region[1]"
           },
           "reasonId": "Pass_0",
-          "message": "Multiple \"region\" landmarks with the same parent region are distinguished by unique 'aria-label' or 'aria-labelledby'",
+          "message": "Multiple elements with \"region\" landmarks within the same parent region are distinguished by unique 'aria-label' or 'aria-labelledby'",
           "messageArgs": [
             "region"
           ],
@@ -274,7 +274,7 @@
             "aria": "/document[1]/main[2]/region[1]/navigation[1]"
           },
           "reasonId": "Pass_0",
-          "message": "Multiple \"navigation\" landmarks with the same parent region are distinguished by unique 'aria-label' or 'aria-labelledby'",
+          "message": "Multiple elements with \"navigation\" landmarks within the same parent region are distinguished by unique 'aria-label' or 'aria-labelledby'",
           "messageArgs": [
             "navigation"
           ],
@@ -292,7 +292,7 @@
             "aria": "/document[1]/main[2]/region[1]/navigation[2]"
           },
           "reasonId": "Pass_0",
-          "message": "Multiple \"navigation\" landmarks with the same parent region are distinguished by unique 'aria-label' or 'aria-labelledby'",
+          "message": "Multiple elements with \"navigation\" landmarks within the same parent region are distinguished by unique 'aria-label' or 'aria-labelledby'",
           "messageArgs": [
             "navigation"
           ],
@@ -310,7 +310,7 @@
             "aria": "/document[1]/main[2]/region[2]"
           },
           "reasonId": "Pass_0",
-          "message": "Multiple \"region\" landmarks with the same parent region are distinguished by unique 'aria-label' or 'aria-labelledby'",
+          "message": "Multiple elements with \"region\" landmarks within the same parent region are distinguished by unique 'aria-label' or 'aria-labelledby'",
           "messageArgs": [
             "region"
           ],
@@ -328,7 +328,7 @@
             "aria": "/document[1]/main[2]/region[2]/navigation[1]"
           },
           "reasonId": "Fail_0",
-          "message": "Multiple \"navigation\" landmarks with the same parent region are not distinguished from one another because they have the same \"Top Label\" label",
+          "message": "Multiple elements with \"navigation\" landmarks within the same parent region are not distinguished from one another because they have the same \"Top Label\" label",
           "messageArgs": [
             "navigation",
             "Top Label"
@@ -347,7 +347,7 @@
             "aria": "/document[1]/main[2]/region[2]/navigation[2]"
           },
           "reasonId": "Fail_0",
-          "message": "Multiple \"navigation\" landmarks with the same parent region are not distinguished from one another because they have the same \"Top Label\" label",
+          "message": "Multiple elements with \"navigation\" landmarks within the same parent region are not distinguished from one another because they have the same \"Top Label\" label",
           "messageArgs": [
             "navigation",
             "Top Label"
@@ -366,7 +366,7 @@
             "aria": "/document[1]/main[2]/region[2]/navigation[3]"
           },
           "reasonId": "Fail_0",
-          "message": "Multiple \"navigation\" landmarks with the same parent region are not distinguished from one another because they have the same \"\" label",
+          "message": "Multiple elements with \"navigation\" landmarks within the same parent region are not distinguished from one another because they have the same \"\" label",
           "messageArgs": [
             "navigation",
             ""
@@ -385,7 +385,7 @@
             "aria": "/document[1]/main[2]/region[2]/navigation[4]"
           },
           "reasonId": "Fail_0",
-          "message": "Multiple \"navigation\" landmarks with the same parent region are not distinguished from one another because they have the same \"\" label",
+          "message": "Multiple elements with \"navigation\" landmarks within the same parent region are not distinguished from one another because they have the same \"\" label",
           "messageArgs": [
             "navigation",
             ""
@@ -404,7 +404,7 @@
             "aria": "/document[1]/main[2]/region[2]/navigation[5]"
           },
           "reasonId": "Fail_0",
-          "message": "Multiple \"navigation\" landmarks with the same parent region are not distinguished from one another because they have the same \"\" label",
+          "message": "Multiple elements with \"navigation\" landmarks within the same parent region are not distinguished from one another because they have the same \"\" label",
           "messageArgs": [
             "navigation",
             ""
@@ -423,7 +423,7 @@
             "aria": "/document[1]/main[2]/region[2]/navigation[6]"
           },
           "reasonId": "Fail_0",
-          "message": "Multiple \"navigation\" landmarks with the same parent region are not distinguished from one another because they have the same \"\" label",
+          "message": "Multiple elements with \"navigation\" landmarks within the same parent region are not distinguished from one another because they have the same \"\" label",
           "messageArgs": [
             "navigation",
             ""
diff --git a/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_parent_required_ruleunit/ACT_ff89c9_fail1.html b/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_parent_required_ruleunit/ACT_ff89c9_fail1.html
index 314b58a06..e7bc7f953 100644
--- a/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_parent_required_ruleunit/ACT_ff89c9_fail1.html
+++ b/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_parent_required_ruleunit/ACT_ff89c9_fail1.html
@@ -40,7 +40,7 @@
               "aria": "/document[1]/listitem[1]"
             },
             "reasonId": "Fail_1",
-            "message": "The element with role \"listitem\" is not contained in or owned by an element with one of the following roles: \"list\"",
+            "message": "Element with \"listitem\" role is not contained in or owned by an element with one of the following roles: \"list\"",
             "messageArgs": [
               "listitem",
               "list"
diff --git a/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_parent_required_ruleunit/ACT_ff89c9_fail2.html b/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_parent_required_ruleunit/ACT_ff89c9_fail2.html
index 766cb1eb5..d0d29e378 100644
--- a/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_parent_required_ruleunit/ACT_ff89c9_fail2.html
+++ b/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_parent_required_ruleunit/ACT_ff89c9_fail2.html
@@ -45,7 +45,7 @@
               "aria": "/document[1]/list[1]/tabpanel[1]/listitem[1]"
             },
             "reasonId": "Fail_1",
-            "message": "The element with role \"listitem\" is not contained in or owned by an element with one of the following roles: \"list\"",
+            "message": "Element with \"listitem\" role is not contained in or owned by an element with one of the following roles: \"list\"",
             "messageArgs": [
               "listitem",
               "list"
@@ -64,7 +64,7 @@
               "aria": "/document[1]/list[1]/tabpanel[1]/listitem[2]"
             },
             "reasonId": "Fail_1",
-            "message": "The element with role \"listitem\" is not contained in or owned by an element with one of the following roles: \"list\"",
+            "message": "Element with \"listitem\" role is not contained in or owned by an element with one of the following roles: \"list\"",
             "messageArgs": [
               "listitem",
               "list"
diff --git a/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_parent_required_ruleunit/ACT_ff89c9_fail3.html b/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_parent_required_ruleunit/ACT_ff89c9_fail3.html
index 09b7d2ad5..3df4de3d3 100644
--- a/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_parent_required_ruleunit/ACT_ff89c9_fail3.html
+++ b/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_parent_required_ruleunit/ACT_ff89c9_fail3.html
@@ -45,7 +45,7 @@
               "aria": "/document[1]/list[1]/generic[1]/listitem[1]"
             },
             "reasonId": "Fail_1",
-            "message": "The element with role \"listitem\" is not contained in or owned by an element with one of the following roles: \"list\"",
+            "message": "Element with \"listitem\" role is not contained in or owned by an element with one of the following roles: \"list\"",
             "messageArgs": [
               "listitem",
               "list"
@@ -64,7 +64,7 @@
               "aria": "/document[1]/list[1]/generic[1]/listitem[2]"
             },
             "reasonId": "Fail_1",
-            "message": "The element with role \"listitem\" is not contained in or owned by an element with one of the following roles: \"list\"",
+            "message": "Element with \"listitem\" role is not contained in or owned by an element with one of the following roles: \"list\"",
             "messageArgs": [
               "listitem",
               "list"
diff --git a/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_parent_required_ruleunit/ACT_ff89c9_fail4.html b/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_parent_required_ruleunit/ACT_ff89c9_fail4.html
index 926ded207..6ce101a29 100644
--- a/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_parent_required_ruleunit/ACT_ff89c9_fail4.html
+++ b/accessibility-checker-engine/test/v2/checker/accessibility/rules/aria_parent_required_ruleunit/ACT_ff89c9_fail4.html
@@ -42,7 +42,7 @@
               "aria": "/document[1]/listitem[1]"
             },
             "reasonId": "Fail_1",
-            "message": "The element with role \"listitem\" is not contained in or owned by an element with one of the following roles: \"list\"",
+            "message": "Element with \"listitem\" role is not contained in or owned by an element with one of the following roles: \"list\"",
             "messageArgs": [
               "listitem",
               "list"
@@ -61,7 +61,7 @@
               "aria": "/document[1]/listitem[2]"
             },
             "reasonId": "Fail_1",
-            "message": "The element with role \"listitem\" is not contained in or owned by an element with one of the following roles: \"list\"",
+            "message": "Element with \"listitem\" role is not contained in or owned by an element with one of the following roles: \"list\"",
             "messageArgs": [
               "listitem",
               "list"