diff --git a/src/wp-content/themes/twentyfifteen/css/editor-blocks.css b/src/wp-content/themes/twentyfifteen/css/editor-blocks.css
index 71afab38b7..1041ff5f14 100644
--- a/src/wp-content/themes/twentyfifteen/css/editor-blocks.css
+++ b/src/wp-content/themes/twentyfifteen/css/editor-blocks.css
@@ -803,7 +803,7 @@ p.has-drop-cap:not(:focus)::first-letter {
 	}
 }
 
-/* Seperator */
+/* Separator */
 
 .wp-block-separator {
 	max-width: 100px;
diff --git a/src/wp-content/themes/twentynineteen/inc/color-patterns.php b/src/wp-content/themes/twentynineteen/inc/color-patterns.php
index 2295436897..abe3419fa9 100644
--- a/src/wp-content/themes/twentynineteen/inc/color-patterns.php
+++ b/src/wp-content/themes/twentynineteen/inc/color-patterns.php
@@ -72,8 +72,8 @@ function twentynineteen_custom_colors_css() {
 		 * Set background for:
 		 * - featured image :before
 		 * - featured image :before
-		 * - post thumbmail :before
-		 * - post thumbmail :before
+		 * - post thumbnail :before
+		 * - post thumbnail :before
 		 * - Submenu
 		 * - Sticky Post
 		 * - buttons
diff --git a/src/wp-content/themes/twentysixteen/css/blocks.css b/src/wp-content/themes/twentysixteen/css/blocks.css
index de6f19fd53..3b6257acf0 100644
--- a/src/wp-content/themes/twentysixteen/css/blocks.css
+++ b/src/wp-content/themes/twentysixteen/css/blocks.css
@@ -292,7 +292,7 @@ p.has-drop-cap:not(:focus)::first-letter {
 	outline-offset: -4px;
 }
 
-/* Seperator */
+/* Separator */
 
 hr.wp-block-separator {
 	border: 0;