diff --git a/src/wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php b/src/wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php
index 3044031f58..ea89a94585 100644
--- a/src/wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php
+++ b/src/wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php
@@ -453,7 +453,7 @@ class WP_REST_Attachments_Controller extends WP_REST_Posts_Controller {
 		);
 
 		$schema['properties']['post'] = array(
-			'description'     => __( 'The id for the associated post of the resource.' ),
+			'description'     => __( 'The ID for the associated post of the resource.' ),
 			'type'            => 'integer',
 			'context'         => array( 'view', 'edit' ),
 		);
diff --git a/src/wp-includes/rest-api/endpoints/class-wp-rest-comments-controller.php b/src/wp-includes/rest-api/endpoints/class-wp-rest-comments-controller.php
index 8f4da17e23..e9a86419f6 100644
--- a/src/wp-includes/rest-api/endpoints/class-wp-rest-comments-controller.php
+++ b/src/wp-includes/rest-api/endpoints/class-wp-rest-comments-controller.php
@@ -1021,7 +1021,7 @@ class WP_REST_Comments_Controller extends WP_REST_Controller {
 				$prepared_comment['comment_author_email'] = $user->user_email;
 				$prepared_comment['comment_author_url'] = $user->user_url;
 			} else {
-				return new WP_Error( 'rest_comment_author_invalid', __( 'Invalid comment author id.' ), array( 'status' => 400 ) );
+				return new WP_Error( 'rest_comment_author_invalid', __( 'Invalid comment author ID.' ), array( 'status' => 400 ) );
 			}
 		}
 
@@ -1102,7 +1102,7 @@ class WP_REST_Comments_Controller extends WP_REST_Controller {
 					'readonly'     => true,
 				),
 				'author'           => array(
-					'description'  => __( 'The id of the user object, if author was a user.' ),
+					'description'  => __( 'The ID of the user object, if author was a user.' ),
 					'type'         => 'integer',
 					'context'      => array( 'view', 'edit', 'embed' ),
 				),
@@ -1187,13 +1187,13 @@ class WP_REST_Comments_Controller extends WP_REST_Controller {
 					'readonly'     => true,
 				),
 				'parent'           => array(
-					'description'  => __( 'The id for the parent of the object.' ),
+					'description'  => __( 'The ID for the parent of the object.' ),
 					'type'         => 'integer',
 					'context'      => array( 'view', 'edit', 'embed' ),
 					'default'      => 0,
 				),
 				'post'             => array(
-					'description'  => __( 'The id of the associated post object.' ),
+					'description'  => __( 'The ID of the associated post object.' ),
 					'type'         => 'integer',
 					'context'      => array( 'view', 'edit' ),
 					'default'      => 0,
diff --git a/src/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php b/src/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php
index 183c1b03f9..0edb92bbfc 100644
--- a/src/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php
+++ b/src/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php
@@ -964,7 +964,7 @@ class WP_REST_Posts_Controller extends WP_REST_Controller {
 				$user_obj = get_userdata( $post_author );
 
 				if ( ! $user_obj ) {
-					return new WP_Error( 'rest_invalid_author', __( 'Invalid author id.' ), array( 'status' => 400 ) );
+					return new WP_Error( 'rest_invalid_author', __( 'Invalid author ID.' ), array( 'status' => 400 ) );
 				}
 			}
 
@@ -995,7 +995,7 @@ class WP_REST_Posts_Controller extends WP_REST_Controller {
 			$parent = get_post( (int) $request['parent'] );
 
 			if ( empty( $parent ) ) {
-				return new WP_Error( 'rest_post_invalid_id', __( 'Invalid post parent id.' ), array( 'status' => 400 ) );
+				return new WP_Error( 'rest_post_invalid_id', __( 'Invalid post parent ID.' ), array( 'status' => 400 ) );
 			}
 
 			$prepared_post->post_parent = (int) $parent->ID;
@@ -1086,7 +1086,7 @@ class WP_REST_Posts_Controller extends WP_REST_Controller {
 			if ( $result ) {
 				return true;
 			} else {
-				return new WP_Error( 'rest_invalid_featured_media', __( 'Invalid featured media id.' ), array( 'status' => 400 ) );
+				return new WP_Error( 'rest_invalid_featured_media', __( 'Invalid featured media ID.' ), array( 'status' => 400 ) );
 			}
 		} else {
 			return delete_post_thumbnail( $post_id );
@@ -1717,7 +1717,7 @@ class WP_REST_Posts_Controller extends WP_REST_Controller {
 
 		if ( $post_type_obj->hierarchical ) {
 			$schema['properties']['parent'] = array(
-				'description' => __( 'The id for the parent of the object.' ),
+				'description' => __( 'The ID for the parent of the object.' ),
 				'type'        => 'integer',
 				'context'     => array( 'view', 'edit' ),
 			);
@@ -1831,7 +1831,7 @@ class WP_REST_Posts_Controller extends WP_REST_Controller {
 
 				case 'author':
 					$schema['properties']['author'] = array(
-						'description' => __( 'The id for the author of the object.' ),
+						'description' => __( 'The ID for the author of the object.' ),
 						'type'        => 'integer',
 						'context'     => array( 'view', 'edit', 'embed' ),
 					);
@@ -1869,7 +1869,7 @@ class WP_REST_Posts_Controller extends WP_REST_Controller {
 
 				case 'thumbnail':
 					$schema['properties']['featured_media'] = array(
-						'description' => __( 'The id of the featured media for the object.' ),
+						'description' => __( 'The ID of the featured media for the object.' ),
 						'type'        => 'integer',
 						'context'     => array( 'view', 'edit' ),
 					);
@@ -2050,7 +2050,7 @@ class WP_REST_Posts_Controller extends WP_REST_Controller {
 
 		if ( $post_type_obj->hierarchical || 'attachment' === $this->post_type ) {
 			$params['parent'] = array(
-				'description'       => __( 'Limit result set to those of particular parent ids.' ),
+				'description'       => __( 'Limit result set to those of particular parent IDs.' ),
 				'type'              => 'array',
 				'items'             => array(
 					'type'          => 'integer',
@@ -2058,7 +2058,7 @@ class WP_REST_Posts_Controller extends WP_REST_Controller {
 				'default'           => array(),
 			);
 			$params['parent_exclude'] = array(
-				'description'       => __( 'Limit result set to all items except those of a particular parent id.' ),
+				'description'       => __( 'Limit result set to all items except those of a particular parent ID.' ),
 				'type'              => 'array',
 				'items'             => array(
 					'type'          => 'integer',
diff --git a/src/wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php b/src/wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php
index 3e551eefb8..907ba054b1 100644
--- a/src/wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php
+++ b/src/wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php
@@ -141,7 +141,7 @@ class WP_REST_Revisions_Controller extends WP_REST_Controller {
 	public function get_items( $request ) {
 		$parent = get_post( $request['parent'] );
 		if ( ! $request['parent'] || ! $parent || $this->parent_post_type !== $parent->post_type ) {
-			return new WP_Error( 'rest_post_invalid_parent', __( 'Invalid post parent id.' ), array( 'status' => 404 ) );
+			return new WP_Error( 'rest_post_invalid_parent', __( 'Invalid post parent ID.' ), array( 'status' => 404 ) );
 		}
 
 		$revisions = wp_get_post_revisions( $request['parent'] );
@@ -179,12 +179,12 @@ class WP_REST_Revisions_Controller extends WP_REST_Controller {
 	public function get_item( $request ) {
 		$parent = get_post( $request['parent'] );
 		if ( ! $request['parent'] || ! $parent || $this->parent_post_type !== $parent->post_type ) {
-			return new WP_Error( 'rest_post_invalid_parent', __( 'Invalid post parent id.' ), array( 'status' => 404 ) );
+			return new WP_Error( 'rest_post_invalid_parent', __( 'Invalid post parent ID.' ), array( 'status' => 404 ) );
 		}
 
 		$revision = get_post( $request['id'] );
 		if ( ! $revision || 'revision' !== $revision->post_type ) {
-			return new WP_Error( 'rest_post_invalid_id', __( 'Invalid revision id.' ), array( 'status' => 404 ) );
+			return new WP_Error( 'rest_post_invalid_id', __( 'Invalid revision ID.' ), array( 'status' => 404 ) );
 		}
 
 		$response = $this->prepare_item_for_response( $revision, $request );
@@ -209,7 +209,7 @@ class WP_REST_Revisions_Controller extends WP_REST_Controller {
 
 		$post = get_post( $request['id'] );
 		if ( ! $post ) {
-			return new WP_Error( 'rest_post_invalid_id', __( 'Invalid revision id.' ), array( 'status' => 404 ) );
+			return new WP_Error( 'rest_post_invalid_id', __( 'Invalid revision ID.' ), array( 'status' => 404 ) );
 		}
 		$post_type = get_post_type_object( 'revision' );
 		return current_user_can( $post_type->cap->delete_post, $post->ID );
@@ -399,7 +399,7 @@ class WP_REST_Revisions_Controller extends WP_REST_Controller {
 			// Base properties for every Revision.
 			'properties' => array(
 				'author'          => array(
-					'description' => __( 'The id for the author of the object.' ),
+					'description' => __( 'The ID for the author of the object.' ),
 					'type'        => 'integer',
 					'context'     => array( 'view', 'edit', 'embed' ),
 				),
@@ -438,7 +438,7 @@ class WP_REST_Revisions_Controller extends WP_REST_Controller {
 					'context'     => array( 'view', 'edit' ),
 				),
 				'parent'          => array(
-					'description' => __( 'The id for the parent of the object.' ),
+					'description' => __( 'The ID for the parent of the object.' ),
 					'type'        => 'integer',
 					'context'     => array( 'view', 'edit', 'embed' ),
 					),
diff --git a/src/wp-includes/rest-api/endpoints/class-wp-rest-terms-controller.php b/src/wp-includes/rest-api/endpoints/class-wp-rest-terms-controller.php
index 65334d356c..46eac98ba6 100644
--- a/src/wp-includes/rest-api/endpoints/class-wp-rest-terms-controller.php
+++ b/src/wp-includes/rest-api/endpoints/class-wp-rest-terms-controller.php
@@ -860,7 +860,7 @@ class WP_REST_Terms_Controller extends WP_REST_Controller {
 
 		if ( $taxonomy->hierarchical ) {
 			$schema['properties']['parent'] = array(
-				'description'  => __( 'The id for the parent of the resource.' ),
+				'description'  => __( 'The ID for the parent of the resource.' ),
 				'type'         => 'integer',
 				'context'      => array( 'view', 'edit' ),
 			);
diff --git a/src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php b/src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php
index a0589fa3c8..5024b0937b 100644
--- a/src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php
+++ b/src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php
@@ -312,7 +312,7 @@ class WP_REST_Users_Controller extends WP_REST_Controller {
 		$types = get_post_types( array( 'show_in_rest' => true ), 'names' );
 
 		if ( empty( $id ) || empty( $user->ID ) ) {
-			return new WP_Error( 'rest_user_invalid_id', __( 'Invalid resource id.' ), array( 'status' => 404 ) );
+			return new WP_Error( 'rest_user_invalid_id', __( 'Invalid resource ID.' ), array( 'status' => 404 ) );
 		}
 
 		if ( get_current_user_id() === $id ) {
@@ -342,7 +342,7 @@ class WP_REST_Users_Controller extends WP_REST_Controller {
 		$user = get_userdata( $id );
 
 		if ( empty( $id ) || empty( $user->ID ) ) {
-			return new WP_Error( 'rest_user_invalid_id', __( 'Invalid resource id.' ), array( 'status' => 404 ) );
+			return new WP_Error( 'rest_user_invalid_id', __( 'Invalid resource ID.' ), array( 'status' => 404 ) );
 		}
 
 		$user = $this->prepare_item_for_response( $user, $request );
@@ -539,7 +539,7 @@ class WP_REST_Users_Controller extends WP_REST_Controller {
 		$user = get_userdata( $id );
 
 		if ( ! $user ) {
-			return new WP_Error( 'rest_user_invalid_id', __( 'Invalid resource id.' ), array( 'status' => 404 ) );
+			return new WP_Error( 'rest_user_invalid_id', __( 'Invalid resource ID.' ), array( 'status' => 404 ) );
 		}
 
 		if ( email_exists( $request['email'] ) && $request['email'] !== $user->user_email ) {
@@ -682,12 +682,12 @@ class WP_REST_Users_Controller extends WP_REST_Controller {
 		$user = get_userdata( $id );
 
 		if ( ! $user ) {
-			return new WP_Error( 'rest_user_invalid_id', __( 'Invalid resource id.' ), array( 'status' => 404 ) );
+			return new WP_Error( 'rest_user_invalid_id', __( 'Invalid resource ID.' ), array( 'status' => 404 ) );
 		}
 
 		if ( ! empty( $reassign ) ) {
 			if ( $reassign === $id || ! get_userdata( $reassign ) ) {
-				return new WP_Error( 'rest_user_invalid_reassign', __( 'Invalid resource id for reassignment.' ), array( 'status' => 400 ) );
+				return new WP_Error( 'rest_user_invalid_reassign', __( 'Invalid resource ID for reassignment.' ), array( 'status' => 400 ) );
 			}
 		}