Clarity in horizontal-groups.md

Author: shawna-slh

process/horizontal-groups.md

@@ -5,13 +5,13 @@ toc: true
 
 The W3C Process mentions the [W3C horizontal Groups](https://www.w3.org/policies/process/#wide-review), described in this document.
 
-## 1. What is an horizontal group ? {#definition}
+## 1. What is are horizontal groups? {#definition}
 
-An horizontal group is tasked to regularly produce expert reviews of proposals and specifications under development by other Working Groups and Community Groups, and of charters for other W3C groups. It may also produce expert reviews of proposals and specifications produced outside of W3C.
+Horizontal groups provide expertise in a specific area. They review relevant proposals, specifications, and charters under development by W3C Working Groups, Interest Groups, and Community Groups. They may also review proposals and specifications produced outside of W3C.
 
 ## 2. List of W3C Horizontal Groups  {#w3c-hr-list}
 
-As of November 2024, there are **5 W3C horizontal groups**:
+As of June 2026, there are **5 W3C horizontal groups**:
 
 - [Accessible Platform Architectures Working Group](https://www.w3.org/groups/wg/apa/)
 - [Internationalization Working Group](https://www.w3.org/groups/wg/i18n-core/)
@@ -21,9 +21,9 @@ As of November 2024, there are **5 W3C horizontal groups**:
 
 ## 3. Other Horizontal Groups  {#other-hr-list}
 
-Some expert groups outside of W3C may also provide an horizontal review. Charters of W3C Working and Interest Groups should explicitly list the relevant expert groups if an horizontal review is expected from them.
+Some expert groups outside of W3C may also provide a horizontal review. Charters of W3C Working and Interest Groups should explicitly list the relevant expert groups if a horizontal review is expected from them.
 
 ## 4. Horizontal Reviews {#horizontal-review}
 
 Horizontal reviews are documented and part of the [wide review](../documentreview/).
-  
+