diff --git a/wp-admin/includes/class-wp-upgrader.php b/wp-admin/includes/class-wp-upgrader.php
index 767a6737df..4270d090da 100644
--- a/wp-admin/includes/class-wp-upgrader.php
+++ b/wp-admin/includes/class-wp-upgrader.php
@@ -580,7 +580,7 @@ class Plugin_Upgrader extends WP_Upgrader {
 			return $removed;
 
 		// If plugin is in its own directory, recursively delete the directory.
-		if ( strpos($plugin, '/') && $this_plugin_dir != $plugins_dir ) //base check on if plugin includes directory seperator AND that its not the root plugin folder
+		if ( strpos($plugin, '/') && $this_plugin_dir != $plugins_dir ) //base check on if plugin includes directory separator AND that its not the root plugin folder
 			$deleted = $wp_filesystem->delete($this_plugin_dir, true);
 		else
 			$deleted = $wp_filesystem->delete($plugins_dir . $plugin);
diff --git a/wp-admin/includes/menu.php b/wp-admin/includes/menu.php
index 158b94574d..40c4fb1cee 100644
--- a/wp-admin/includes/menu.php
+++ b/wp-admin/includes/menu.php
@@ -121,18 +121,18 @@ foreach ( $menu as $id => $data ) {
 }
 unset($id, $data, $subs, $first_sub);
 
-// Remove any duplicated seperators
-$seperator_found = false;
+// Remove any duplicated separators
+$separator_found = false;
 foreach ( $menu as $id => $data ) {
 	if ( 0 == strcmp('wp-menu-separator', $data[4] ) ) {
-		if (false == $seperator_found) {
-			$seperator_found = true;
+		if (false == $separator_found) {
+			$separator_found = true;
 		} else {
 			unset($menu[$id]);
-			$seperator_found = false;
+			$separator_found = false;
 		}
 	} else {
-		$seperator_found = false;
+		$separator_found = false;
 	}
 }
 unset($id, $data);
diff --git a/wp-admin/includes/plugin.php b/wp-admin/includes/plugin.php
index 1597b2230d..6b0edcc31c 100644
--- a/wp-admin/includes/plugin.php
+++ b/wp-admin/includes/plugin.php
@@ -702,7 +702,7 @@ function delete_plugins($plugins, $redirect = '' ) {
 
 		$this_plugin_dir = trailingslashit( dirname($plugins_dir . $plugin_file) );
 		// If plugin is in its own directory, recursively delete the directory.
-		if ( strpos($plugin_file, '/') && $this_plugin_dir != $plugins_dir ) //base check on if plugin includes directory seperator AND that its not the root plugin folder
+		if ( strpos($plugin_file, '/') && $this_plugin_dir != $plugins_dir ) //base check on if plugin includes directory separator AND that its not the root plugin folder
 			$deleted = $wp_filesystem->delete($this_plugin_dir, true);
 		else
 			$deleted = $wp_filesystem->delete($plugins_dir . $plugin_file);