diff --git a/wp-admin/comment.php b/wp-admin/comment.php
index 4db8c5784f..0687f07888 100644
--- a/wp-admin/comment.php
+++ b/wp-admin/comment.php
@@ -125,19 +125,19 @@ switch ( $action ) {
 		switch ( $action ) {
 			case 'spam':
 				$caution_msg = __( 'You are about to mark the following comment as spam:' );
-				$button      = _x( 'Mark as Spam', 'comment' );
+				$button      = _x( 'Mark as spam', 'comment' );
 				break;
 			case 'trash':
 				$caution_msg = __( 'You are about to move the following comment to the Trash:' );
-				$button      = __( 'Move to Trash' );
+				$button      = __( 'Move to trash' );
 				break;
 			case 'delete':
 				$caution_msg = __( 'You are about to delete the following comment:' );
-				$button      = __( 'Permanently Delete Comment' );
+				$button      = __( 'Permanently delete comment' );
 				break;
 			default:
 				$caution_msg = __( 'You are about to approve the following comment:' );
-				$button      = __( 'Approve Comment' );
+				$button      = __( 'Approve comment' );
 				break;
 		}
 
@@ -179,7 +179,7 @@ switch ( $action ) {
 </tr>
 <?php } ?>
 <tr>
-	<th scope="row"><?php /* translators: Column name or table row header. */ _e( 'In Response To' ); ?></th>
+	<th scope="row"><?php /* translators: Column name or table row header. */ _e( 'In response to' ); ?></th>
 	<td>
 		<?php
 		$post_id = $comment->comment_post_ID;
diff --git a/wp-admin/edit-comments.php b/wp-admin/edit-comments.php
index 978040065f..2ced05ab2d 100644
--- a/wp-admin/edit-comments.php
+++ b/wp-admin/edit-comments.php
@@ -172,7 +172,7 @@ get_current_screen()->add_help_tab(
 		'id'      => 'overview',
 		'title'   => __( 'Overview' ),
 		'content' =>
-				'<p>' . __( 'You can manage comments made on your site similar to the way you manage posts and other content. This screen is customizable in the same ways as other management screens, and you can act on comments using the on-hover action links or the Bulk Actions.' ) . '</p>',
+				'<p>' . __( 'You can manage comments made on your site similar to the way you manage posts and other content. This screen is customizable in the same ways as other management screens, and you can act on comments using the on-hover action links or the bulk actions.' ) . '</p>',
 	)
 );
 get_current_screen()->add_help_tab(
@@ -183,8 +183,8 @@ get_current_screen()->add_help_tab(
 					'<p>' . __( 'A red bar on the left means the comment is waiting for you to moderate it.' ) . '</p>' .
 					'<p>' . __( 'In the <strong>Author</strong> column, in addition to the author&#8217;s name, email address, and blog URL, the commenter&#8217;s IP address is shown. Clicking on this link will show you all the comments made from this IP address.' ) . '</p>' .
 					'<p>' . __( 'In the <strong>Comment</strong> column, hovering over any comment gives you options to approve, reply (and approve), quick edit, edit, spam mark, or trash that comment.' ) . '</p>' .
-					'<p>' . __( 'In the <strong>In Response To</strong> column, there are three elements. The text is the name of the post that inspired the comment, and links to the post editor for that entry. The View Post link leads to that post on your live site. The small bubble with the number in it shows the number of approved comments that post has received. If there are pending comments, a red notification circle with the number of pending comments is displayed. Clicking the notification circle will filter the comments screen to show only pending comments on that post.' ) . '</p>' .
-					'<p>' . __( 'In the <strong>Submitted On</strong> column, the date and time the comment was left on your site appears. Clicking on the date/time link will take you to that comment on your live site.' ) . '</p>' .
+					'<p>' . __( 'In the <strong>In response to</strong> column, there are three elements. The text is the name of the post that inspired the comment, and links to the post editor for that entry. The View Post link leads to that post on your live site. The small bubble with the number in it shows the number of approved comments that post has received. If there are pending comments, a red notification circle with the number of pending comments is displayed. Clicking the notification circle will filter the comments screen to show only pending comments on that post.' ) . '</p>' .
+					'<p>' . __( 'In the <strong>Submitted on</strong> column, the date and time the comment was left on your site appears. Clicking on the date/time link will take you to that comment on your live site.' ) . '</p>' .
 					'<p>' . __( 'Many people take advantage of keyboard shortcuts to moderate their comments more quickly. Use the link to the side to learn more.' ) . '</p>',
 	)
 );
diff --git a/wp-admin/edit-form-comment.php b/wp-admin/edit-form-comment.php
index 38f6c7b9b0..e7fe548a80 100644
--- a/wp-admin/edit-form-comment.php
+++ b/wp-admin/edit-form-comment.php
@@ -202,7 +202,7 @@ endif;
 
 <div id="major-publishing-actions">
 <div id="delete-action">
-<?php echo "<a class='submitdelete deletion' href='" . wp_nonce_url( 'comment.php?action=' . ( ! EMPTY_TRASH_DAYS ? 'deletecomment' : 'trashcomment' ) . "&amp;c=$comment->comment_ID&amp;_wp_original_http_referer=" . urlencode( wp_get_referer() ), 'delete-comment_' . $comment->comment_ID ) . "'>" . ( ! EMPTY_TRASH_DAYS ? __( 'Delete Permanently' ) : __( 'Move to Trash' ) ) . "</a>\n"; ?>
+<?php echo "<a class='submitdelete deletion' href='" . wp_nonce_url( 'comment.php?action=' . ( ! EMPTY_TRASH_DAYS ? 'deletecomment' : 'trashcomment' ) . "&amp;c=$comment->comment_ID&amp;_wp_original_http_referer=" . urlencode( wp_get_referer() ), 'delete-comment_' . $comment->comment_ID ) . "'>" . ( ! EMPTY_TRASH_DAYS ? __( 'Delete Permanently' ) : __( 'Move to trash' ) ) . "</a>\n"; ?>
 </div>
 <div id="publishing-action">
 <?php submit_button( __( 'Update' ), 'primary large', 'save', false ); ?>
diff --git a/wp-admin/edit.php b/wp-admin/edit.php
index f6e85059f3..35aca175d4 100644
--- a/wp-admin/edit.php
+++ b/wp-admin/edit.php
@@ -264,9 +264,9 @@ if ( 'post' === $post_type ) {
 	get_current_screen()->add_help_tab(
 		array(
 			'id'      => 'bulk-actions',
-			'title'   => __( 'Bulk Actions' ),
+			'title'   => __( 'Bulk actions' ),
 			'content' =>
-					'<p>' . __( 'You can also edit or move multiple posts to the Trash at once. Select the posts you want to act on using the checkboxes, then select the action you want to take from the Bulk Actions menu and click Apply.' ) . '</p>' .
+					'<p>' . __( 'You can also edit or move multiple posts to the Trash at once. Select the posts you want to act on using the checkboxes, then select the action you want to take from the Bulk actions menu and click Apply.' ) . '</p>' .
 							'<p>' . __( 'When using Bulk Edit, you can change the metadata (categories, author, etc.) for all selected posts at once. To remove a post from the grouping, just click the x next to its name in the Bulk Edit area that appears.' ) . '</p>',
 		)
 	);
@@ -292,7 +292,7 @@ if ( 'post' === $post_type ) {
 			'title'   => __( 'Managing Pages' ),
 			'content' =>
 					'<p>' . __( 'Managing pages is very similar to managing posts, and the screens can be customized in the same way.' ) . '</p>' .
-					'<p>' . __( 'You can also perform the same types of actions, including narrowing the list by using the filters, acting on a page using the action links that appear when you hover over a row, or using the Bulk Actions menu to edit the metadata for multiple pages at once.' ) . '</p>',
+					'<p>' . __( 'You can also perform the same types of actions, including narrowing the list by using the filters, acting on a page using the action links that appear when you hover over a row, or using the Bulk actions menu to edit the metadata for multiple pages at once.' ) . '</p>',
 		)
 	);
 
diff --git a/wp-admin/includes/class-wp-comments-list-table.php b/wp-admin/includes/class-wp-comments-list-table.php
index e3678b60d5..904a2dce47 100644
--- a/wp-admin/includes/class-wp-comments-list-table.php
+++ b/wp-admin/includes/class-wp-comments-list-table.php
@@ -351,19 +351,19 @@ class WP_Comments_List_Table extends WP_List_Table {
 			$actions['approve'] = __( 'Approve' );
 		}
 		if ( in_array( $comment_status, array( 'all', 'moderated', 'approved', 'trash' ), true ) ) {
-			$actions['spam'] = _x( 'Mark as Spam', 'comment' );
+			$actions['spam'] = _x( 'Mark as spam', 'comment' );
 		}
 
 		if ( 'trash' === $comment_status ) {
 			$actions['untrash'] = __( 'Restore' );
 		} elseif ( 'spam' === $comment_status ) {
-			$actions['unspam'] = _x( 'Not Spam', 'comment' );
+			$actions['unspam'] = _x( 'Not spam', 'comment' );
 		}
 
 		if ( in_array( $comment_status, array( 'trash', 'spam' ), true ) || ! EMPTY_TRASH_DAYS ) {
-			$actions['delete'] = __( 'Delete Permanently' );
+			$actions['delete'] = __( 'Delete permanently' );
 		} else {
-			$actions['trash'] = __( 'Move to Trash' );
+			$actions['trash'] = __( 'Move to trash' );
 		}
 
 		return $actions;
@@ -467,10 +467,10 @@ class WP_Comments_List_Table extends WP_List_Table {
 
 		if ( ! $post_id ) {
 			/* translators: Column name or table row header. */
-			$columns['response'] = __( 'In Response To' );
+			$columns['response'] = __( 'In response to' );
 		}
 
-		$columns['date'] = _x( 'Submitted On', 'column name' );
+		$columns['date'] = _x( 'Submitted on', 'column name' );
 
 		return $columns;
 	}
diff --git a/wp-admin/includes/class-wp-list-table.php b/wp-admin/includes/class-wp-list-table.php
index 7cf6f0725f..e6d829e39f 100644
--- a/wp-admin/includes/class-wp-list-table.php
+++ b/wp-admin/includes/class-wp-list-table.php
@@ -445,7 +445,7 @@ class WP_List_Table {
 			$this->_actions = $this->get_bulk_actions();
 
 			/**
-			 * Filters the list table Bulk Actions drop-down.
+			 * Filters the list table bulk actions drop-down.
 			 *
 			 * The dynamic portion of the hook name, `$this->screen->id`, refers
 			 * to the ID of the current screen, usually a string.
@@ -469,7 +469,7 @@ class WP_List_Table {
 
 		echo '<label for="bulk-action-selector-' . esc_attr( $which ) . '" class="screen-reader-text">' . __( 'Select bulk action' ) . '</label>';
 		echo '<select name="action' . $two . '" id="bulk-action-selector-' . esc_attr( $which ) . "\">\n";
-		echo '<option value="-1">' . __( 'Bulk Actions' ) . "</option>\n";
+		echo '<option value="-1">' . __( 'Bulk actions' ) . "</option>\n";
 
 		foreach ( $this->_actions as $name => $title ) {
 			$class = 'edit' === $name ? ' class="hide-if-no-js"' : '';
diff --git a/wp-admin/includes/class-wp-media-list-table.php b/wp-admin/includes/class-wp-media-list-table.php
index 8fc319ebed..630553d63f 100644
--- a/wp-admin/includes/class-wp-media-list-table.php
+++ b/wp-admin/includes/class-wp-media-list-table.php
@@ -149,12 +149,12 @@ class WP_Media_List_Table extends WP_List_Table {
 		if ( MEDIA_TRASH ) {
 			if ( $this->is_trash ) {
 				$actions['untrash'] = __( 'Restore' );
-				$actions['delete']  = __( 'Delete Permanently' );
+				$actions['delete']  = __( 'Delete permanently' );
 			} else {
-				$actions['trash'] = __( 'Move to Trash' );
+				$actions['trash'] = __( 'Move to trash' );
 			}
 		} else {
-			$actions['delete'] = __( 'Delete Permanently' );
+			$actions['delete'] = __( 'Delete permanently' );
 		}
 
 		if ( $this->detached ) {
diff --git a/wp-admin/includes/class-wp-posts-list-table.php b/wp-admin/includes/class-wp-posts-list-table.php
index 065e5d0382..141ca89a58 100644
--- a/wp-admin/includes/class-wp-posts-list-table.php
+++ b/wp-admin/includes/class-wp-posts-list-table.php
@@ -415,9 +415,9 @@ class WP_Posts_List_Table extends WP_List_Table {
 
 		if ( current_user_can( $post_type_obj->cap->delete_posts ) ) {
 			if ( $this->is_trash || ! EMPTY_TRASH_DAYS ) {
-				$actions['delete'] = __( 'Delete Permanently' );
+				$actions['delete'] = __( 'Delete permanently' );
 			} else {
-				$actions['trash'] = __( 'Move to Trash' );
+				$actions['trash'] = __( 'Move to trash' );
 			}
 		}
 
diff --git a/wp-admin/includes/meta-boxes.php b/wp-admin/includes/meta-boxes.php
index 504d950f53..4584fff555 100644
--- a/wp-admin/includes/meta-boxes.php
+++ b/wp-admin/includes/meta-boxes.php
@@ -332,9 +332,9 @@ function post_submit_meta_box( $post, $args = array() ) {
 		<?php
 		if ( current_user_can( 'delete_post', $post_id ) ) {
 			if ( ! EMPTY_TRASH_DAYS ) {
-				$delete_text = __( 'Delete Permanently' );
+				$delete_text = __( 'Delete permanently' );
 			} else {
-				$delete_text = __( 'Move to Trash' );
+				$delete_text = __( 'Move to trash' );
 			}
 			?>
 			<a class="submitdelete deletion" href="<?php echo get_delete_post_link( $post_id ); ?>"><?php echo $delete_text; ?></a>
@@ -438,10 +438,10 @@ function attachment_submit_meta_box( $post ) {
 	<?php
 	if ( current_user_can( 'delete_post', $post->ID ) ) {
 		if ( EMPTY_TRASH_DAYS && MEDIA_TRASH ) {
-			echo "<a class='submitdelete deletion' href='" . get_delete_post_link( $post->ID ) . "'>" . __( 'Move to Trash' ) . '</a>';
+			echo "<a class='submitdelete deletion' href='" . get_delete_post_link( $post->ID ) . "'>" . __( 'Move to trash' ) . '</a>';
 		} else {
 			$delete_ays = ! MEDIA_TRASH ? " onclick='return showNotice.warn();'" : '';
-			echo "<a class='submitdelete deletion'$delete_ays href='" . get_delete_post_link( $post->ID, null, true ) . "'>" . __( 'Delete Permanently' ) . '</a>';
+			echo "<a class='submitdelete deletion'$delete_ays href='" . get_delete_post_link( $post->ID, null, true ) . "'>" . __( 'Delete permanently' ) . '</a>';
 		}
 	}
 	?>
@@ -1115,7 +1115,7 @@ function link_categories_meta_box( $link ) {
 	?>
 <div id="taxonomy-linkcategory" class="categorydiv">
 	<ul id="category-tabs" class="category-tabs">
-		<li class="tabs"><a href="#categories-all"><?php _e( 'All Categories' ); ?></a></li>
+		<li class="tabs"><a href="#categories-all"><?php _e( 'All categories' ); ?></a></li>
 		<li class="hide-if-no-js"><a href="#categories-pop"><?php _ex( 'Most Used', 'categories' ); ?></a></li>
 	</ul>
 
diff --git a/wp-admin/users.php b/wp-admin/users.php
index 3742e95276..41fea921c8 100644
--- a/wp-admin/users.php
+++ b/wp-admin/users.php
@@ -53,9 +53,9 @@ $help = '<p>' . __( 'Hovering over a row in the users list will display action l
 	'<li>' . __( '<strong>Edit</strong> takes you to the editable profile screen for that user. You can also reach that screen by clicking on the username.' ) . '</li>';
 
 if ( is_multisite() ) {
-	$help .= '<li>' . __( '<strong>Remove</strong> allows you to remove a user from your site. It does not delete their content. You can also remove multiple users at once by using Bulk Actions.' ) . '</li>';
+	$help .= '<li>' . __( '<strong>Remove</strong> allows you to remove a user from your site. It does not delete their content. You can also remove multiple users at once by using bulk actions.' ) . '</li>';
 } else {
-	$help .= '<li>' . __( '<strong>Delete</strong> brings you to the Delete Users screen for confirmation, where you can permanently remove a user from your site and delete their content. You can also delete multiple users at once by using Bulk Actions.' ) . '</li>';
+	$help .= '<li>' . __( '<strong>Delete</strong> brings you to the Delete Users screen for confirmation, where you can permanently remove a user from your site and delete their content. You can also delete multiple users at once by using bulk actions.' ) . '</li>';
 }
 
 $help .= '</ul>';
diff --git a/wp-includes/media-template.php b/wp-includes/media-template.php
index 43053edfa9..7a0057df8a 100644
--- a/wp-includes/media-template.php
+++ b/wp-includes/media-template.php
@@ -518,12 +518,12 @@ function wp_print_media_templates() {
 				<# if ( ! data.uploading && data.can.remove ) { #> |
 					<?php if ( MEDIA_TRASH ) : ?>
 						<# if ( 'trash' === data.status ) { #>
-							<button type="button" class="button-link untrash-attachment"><?php _e( 'Restore from Trash' ); ?></button>
+							<button type="button" class="button-link untrash-attachment"><?php _e( 'Restore from trash' ); ?></button>
 						<# } else { #>
-							<button type="button" class="button-link trash-attachment"><?php _e( 'Move to Trash' ); ?></button>
+							<button type="button" class="button-link trash-attachment"><?php _e( 'Move to trash' ); ?></button>
 						<# } #>
 					<?php else : ?>
-						<button type="button" class="button-link delete-attachment"><?php _e( 'Delete Permanently' ); ?></button>
+						<button type="button" class="button-link delete-attachment"><?php _e( 'Delete permanently' ); ?></button>
 					<?php endif; ?>
 				<# } #>
 			</div>
@@ -639,12 +639,12 @@ function wp_print_media_templates() {
 				<# if ( ! data.uploading && data.can.remove ) { #>
 					<?php if ( MEDIA_TRASH ) : ?>
 					<# if ( 'trash' === data.status ) { #>
-						<button type="button" class="button-link untrash-attachment"><?php _e( 'Restore from Trash' ); ?></button>
+						<button type="button" class="button-link untrash-attachment"><?php _e( 'Restore from trash' ); ?></button>
 					<# } else { #>
-						<button type="button" class="button-link trash-attachment"><?php _e( 'Move to Trash' ); ?></button>
+						<button type="button" class="button-link trash-attachment"><?php _e( 'Move to trash' ); ?></button>
 					<# } #>
 					<?php else : ?>
-						<button type="button" class="button-link delete-attachment"><?php _e( 'Delete Permanently' ); ?></button>
+						<button type="button" class="button-link delete-attachment"><?php _e( 'Delete permanently' ); ?></button>
 					<?php endif; ?>
 				<# } #>
 
diff --git a/wp-includes/media.php b/wp-includes/media.php
index 94a46a596d..4361ee753d 100644
--- a/wp-includes/media.php
+++ b/wp-includes/media.php
@@ -4156,7 +4156,7 @@ function wp_enqueue_media( $args = array() ) {
 		// Generic.
 		'mediaFrameDefaultTitle'      => __( 'Media' ),
 		'url'                         => __( 'URL' ),
-		'addMedia'                    => __( 'Add Media' ),
+		'addMedia'                    => __( 'Add media' ),
 		'search'                      => __( 'Search' ),
 		'select'                      => __( 'Select' ),
 		'cancel'                      => __( 'Cancel' ),
@@ -4173,12 +4173,12 @@ function wp_enqueue_media( $args = array() ) {
 		'dragInfo'                    => __( 'Drag and drop to reorder media files.' ),
 
 		// Upload.
-		'uploadFilesTitle'            => __( 'Upload Files' ),
-		'uploadImagesTitle'           => __( 'Upload Images' ),
+		'uploadFilesTitle'            => __( 'Upload files' ),
+		'uploadImagesTitle'           => __( 'Upload images' ),
 
 		// Library.
 		'mediaLibraryTitle'           => __( 'Media Library' ),
-		'insertMediaTitle'            => __( 'Add Media' ),
+		'insertMediaTitle'            => __( 'Add media' ),
 		'createNewGallery'            => __( 'Create a new gallery' ),
 		'createNewPlaylist'           => __( 'Create a new playlist' ),
 		'createNewVideoPlaylist'      => __( 'Create a new video playlist' ),
@@ -4194,15 +4194,15 @@ function wp_enqueue_media( $args = array() ) {
 		'warnDelete'                  => __( "You are about to permanently delete this item from your site.\nThis action cannot be undone.\n 'Cancel' to stop, 'OK' to delete." ),
 		'warnBulkDelete'              => __( "You are about to permanently delete these items from your site.\nThis action cannot be undone.\n 'Cancel' to stop, 'OK' to delete." ),
 		'warnBulkTrash'               => __( "You are about to trash these items.\n  'Cancel' to stop, 'OK' to delete." ),
-		'bulkSelect'                  => __( 'Bulk Select' ),
-		'trashSelected'               => __( 'Move to Trash' ),
-		'restoreSelected'             => __( 'Restore from Trash' ),
-		'deletePermanently'           => __( 'Delete Permanently' ),
+		'bulkSelect'                  => __( 'Bulk select' ),
+		'trashSelected'               => __( 'Move to trash' ),
+		'restoreSelected'             => __( 'Restore from trash' ),
+		'deletePermanently'           => __( 'Delete permanently' ),
 		'apply'                       => __( 'Apply' ),
 		'filterByDate'                => __( 'Filter by date' ),
 		'filterByType'                => __( 'Filter by type' ),
 		'searchLabel'                 => __( 'Search' ),
-		'searchMediaLabel'            => __( 'Search Media' ),          // Backward compatibility pre-5.3.
+		'searchMediaLabel'            => __( 'Search media' ),          // Backward compatibility pre-5.3.
 		'searchMediaPlaceholder'      => __( 'Search media items...' ), // Placeholder (no ellipsis), backward compatibility pre-5.3.
 		'mediaFound'                  => __( 'Number of media items found: %d' ),
 		'mediaFoundHasMoreResults'    => __( 'Number of media items displayed: %d. Scroll the page for more results.' ),
@@ -4210,7 +4210,7 @@ function wp_enqueue_media( $args = array() ) {
 		'noMediaTryNewSearch'         => __( 'No media items found. Try a different search.' ),
 
 		// Library Details.
-		'attachmentDetails'           => __( 'Attachment Details' ),
+		'attachmentDetails'           => __( 'Attachment details' ),
 
 		// From URL.
 		'insertFromUrlTitle'          => __( 'Insert from URL' ),
@@ -4220,26 +4220,26 @@ function wp_enqueue_media( $args = array() ) {
 		'setFeaturedImage'            => $post_type_object->labels->set_featured_image,
 
 		// Gallery.
-		'createGalleryTitle'          => __( 'Create Gallery' ),
-		'editGalleryTitle'            => __( 'Edit Gallery' ),
-		'cancelGalleryTitle'          => __( '&#8592; Cancel Gallery' ),
+		'createGalleryTitle'          => __( 'Create gallery' ),
+		'editGalleryTitle'            => __( 'Edit gallery' ),
+		'cancelGalleryTitle'          => __( '&#8592; Cancel gallery' ),
 		'insertGallery'               => __( 'Insert gallery' ),
 		'updateGallery'               => __( 'Update gallery' ),
 		'addToGallery'                => __( 'Add to gallery' ),
-		'addToGalleryTitle'           => __( 'Add to Gallery' ),
+		'addToGalleryTitle'           => __( 'Add to gallery' ),
 		'reverseOrder'                => __( 'Reverse order' ),
 
 		// Edit Image.
-		'imageDetailsTitle'           => __( 'Image Details' ),
-		'imageReplaceTitle'           => __( 'Replace Image' ),
-		'imageDetailsCancel'          => __( 'Cancel Edit' ),
-		'editImage'                   => __( 'Edit Image' ),
+		'imageDetailsTitle'           => __( 'Image details' ),
+		'imageReplaceTitle'           => __( 'Replace image' ),
+		'imageDetailsCancel'          => __( 'Cancel edit' ),
+		'editImage'                   => __( 'Edit image' ),
 
 		// Crop Image.
-		'chooseImage'                 => __( 'Choose Image' ),
-		'selectAndCrop'               => __( 'Select and Crop' ),
-		'skipCropping'                => __( 'Skip Cropping' ),
-		'cropImage'                   => __( 'Crop Image' ),
+		'chooseImage'                 => __( 'Choose image' ),
+		'selectAndCrop'               => __( 'Select and crop' ),
+		'skipCropping'                => __( 'Skip cropping' ),
+		'cropImage'                   => __( 'Crop image' ),
 		'cropYourImage'               => __( 'Crop your image' ),
 		'cropping'                    => __( 'Cropping&hellip;' ),
 		/* translators: 1: Suggested width number, 2: Suggested height number. */
@@ -4247,24 +4247,24 @@ function wp_enqueue_media( $args = array() ) {
 		'cropError'                   => __( 'There has been an error cropping your image.' ),
 
 		// Edit Audio.
-		'audioDetailsTitle'           => __( 'Audio Details' ),
-		'audioReplaceTitle'           => __( 'Replace Audio' ),
-		'audioAddSourceTitle'         => __( 'Add Audio Source' ),
-		'audioDetailsCancel'          => __( 'Cancel Edit' ),
+		'audioDetailsTitle'           => __( 'Audio details' ),
+		'audioReplaceTitle'           => __( 'Replace audio' ),
+		'audioAddSourceTitle'         => __( 'Add audio source' ),
+		'audioDetailsCancel'          => __( 'Cancel edit' ),
 
 		// Edit Video.
-		'videoDetailsTitle'           => __( 'Video Details' ),
-		'videoReplaceTitle'           => __( 'Replace Video' ),
-		'videoAddSourceTitle'         => __( 'Add Video Source' ),
-		'videoDetailsCancel'          => __( 'Cancel Edit' ),
-		'videoSelectPosterImageTitle' => __( 'Select Poster Image' ),
-		'videoAddTrackTitle'          => __( 'Add Subtitles' ),
+		'videoDetailsTitle'           => __( 'Video details' ),
+		'videoReplaceTitle'           => __( 'Replace video' ),
+		'videoAddSourceTitle'         => __( 'Add video source' ),
+		'videoDetailsCancel'          => __( 'Cancel edit' ),
+		'videoSelectPosterImageTitle' => __( 'Select poster image' ),
+		'videoAddTrackTitle'          => __( 'Add subtitles' ),
 
 		// Playlist.
 		'playlistDragInfo'            => __( 'Drag and drop to reorder tracks.' ),
-		'createPlaylistTitle'         => __( 'Create Audio Playlist' ),
-		'editPlaylistTitle'           => __( 'Edit Audio Playlist' ),
-		'cancelPlaylistTitle'         => __( '&#8592; Cancel Audio Playlist' ),
+		'createPlaylistTitle'         => __( 'Create audio playlist' ),
+		'editPlaylistTitle'           => __( 'Edit audio playlist' ),
+		'cancelPlaylistTitle'         => __( '&#8592; Cancel audio playlist' ),
 		'insertPlaylist'              => __( 'Insert audio playlist' ),
 		'updatePlaylist'              => __( 'Update audio playlist' ),
 		'addToPlaylist'               => __( 'Add to audio playlist' ),
@@ -4272,16 +4272,16 @@ function wp_enqueue_media( $args = array() ) {
 
 		// Video Playlist.
 		'videoPlaylistDragInfo'       => __( 'Drag and drop to reorder videos.' ),
-		'createVideoPlaylistTitle'    => __( 'Create Video Playlist' ),
-		'editVideoPlaylistTitle'      => __( 'Edit Video Playlist' ),
-		'cancelVideoPlaylistTitle'    => __( '&#8592; Cancel Video Playlist' ),
+		'createVideoPlaylistTitle'    => __( 'Create video playlist' ),
+		'editVideoPlaylistTitle'      => __( 'Edit video playlist' ),
+		'cancelVideoPlaylistTitle'    => __( '&#8592; Cancel video playlist' ),
 		'insertVideoPlaylist'         => __( 'Insert video playlist' ),
 		'updateVideoPlaylist'         => __( 'Update video playlist' ),
 		'addToVideoPlaylist'          => __( 'Add to video playlist' ),
-		'addToVideoPlaylistTitle'     => __( 'Add to Video Playlist' ),
+		'addToVideoPlaylistTitle'     => __( 'Add to video Playlist' ),
 
 		// Headings.
-		'filterAttachments'           => __( 'Filter Media' ),
+		'filterAttachments'           => __( 'Filter media' ),
 		'attachmentsList'             => __( 'Media list' ),
 	);
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index ca87e51921..3f95cecce6 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.5-alpha-48351';
+$wp_version = '5.5-alpha-48352';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.