diff --git a/core/includes/ajax.inc b/core/includes/ajax.inc
index cb85967..186d1f3 100644
--- a/core/includes/ajax.inc
+++ b/core/includes/ajax.inc
@@ -128,7 +128,7 @@
  * \Drupal\Core\Ajax\CommandInterface. Available commands provide the ability
  * to pop up alerts, manipulate text and markup in various ways, redirect
  * to a new URL, and the generic \Drupal\Core\Ajax\InvokeCommand, which
- * invokes an arbitrary jQuery commnd.
+ * invokes an arbitrary jQuery command.
  *
  * As noted above, status messages are prepended automatically if you use the
  * 'wrapper' method and return HTML markup. This is not the case if you return
diff --git a/core/includes/bootstrap.inc b/core/includes/bootstrap.inc
index 35959e0..1e1cc30 100644
--- a/core/includes/bootstrap.inc
+++ b/core/includes/bootstrap.inc
@@ -958,7 +958,7 @@ function drupal_set_message($message = NULL, $type = 'status', $repeat = FALSE)
  *   the top-level keys as the message type. The messages returned are
  *   limited to the type specified in the $type parameter, if any. If there
  *   are no messages of the specified type, an empty array is returned. See
- *   drupal_set_message() for the array structure of indivdual messages.
+ *   drupal_set_message() for the array structure of individual messages.
  *
  * @see drupal_set_message()
  * @see theme_status_messages()
@@ -1004,7 +1004,7 @@ function drupal_get_messages($type = NULL, $clear_queue = TRUE) {
  * @param $phase
  *   A constant telling which phase to bootstrap to. Possible values:
  *   - DRUPAL_BOOTSTRAP_CONFIGURATION: Initializes configuration.
- *   - DRUPAL_BOOTSTRAP_KERNEL: Initalizes a kernel.
+ *   - DRUPAL_BOOTSTRAP_KERNEL: Initializes a kernel.
  *
  * @return int
  *   The most recently completed phase.
@@ -1487,7 +1487,7 @@ function drupal_classloader_register($name, $path) {
  * static $foo = &drupal_static(__FUNCTION__);
  * @endcode
  * However, the above line of code does not work, because PHP only allows static
- * variables to be initializied by literal values, and does not allow static
+ * variables to be initialized by literal values, and does not allow static
  * variables to be assigned to references.
  * - http://php.net/manual/language.variables.scope.php#language.variables.scope.static
  * - http://php.net/manual/language.variables.scope.php#language.variables.scope.references
diff --git a/core/includes/common.inc b/core/includes/common.inc
index 3d245a0..2706c68 100644
--- a/core/includes/common.inc
+++ b/core/includes/common.inc
@@ -972,7 +972,7 @@ function drupal_add_html_head_link($attributes, $header = FALSE) {
  *     The aggregate group number affects load order and the CSS cascade.
  *     Stylesheets in an aggregate with a lower group number will be output to
  *     the page before stylesheets in an aggregate with a higher group number,
- *     so CSS within higher aggregate groups can take precendence over CSS
+ *     so CSS within higher aggregate groups can take precedence over CSS
  *     within lower aggregate groups.
  *   - 'every_page': For optimal front-end performance when aggregation is
  *     enabled, this should be set to TRUE if the stylesheet is present on every
@@ -1018,7 +1018,7 @@ function drupal_add_html_head_link($attributes, $header = FALSE) {
  *     See http://drupal.org/node/1887922
  *   - 'media': The media type for the stylesheet, e.g., all, print, screen.
  *     Defaults to 'all'. It is extremely important to leave this set to 'all'
- *     or it will negatively impact front-end peformance. Instead add a @media
+ *     or it will negatively impact front-end performance. Instead add a @media
  *     block to the included CSS file.
  *   - 'preprocess': If TRUE and CSS aggregation/compression is enabled, the
  *     styles will be aggregated and compressed. Defaults to TRUE.
@@ -2912,7 +2912,7 @@ function drupal_render(&$elements, $is_recursive_call = FALSE) {
 
   // Filter the outputted content and make any last changes before the
   // content is sent to the browser. The changes are made on $content
-  // which allows the output'ed text to be filtered.
+  // which allows the outputted text to be filtered.
   if (isset($elements['#post_render'])) {
     foreach ($elements['#post_render'] as $callable) {
       if (is_string($callable) && strpos($callable, '::') === FALSE) {
diff --git a/core/includes/database.inc b/core/includes/database.inc
index d1fef5a..6d5318b 100644
--- a/core/includes/database.inc
+++ b/core/includes/database.inc
@@ -153,7 +153,7 @@
  *   ->execute();
  * @endcode
  *
- * @section sec_transaction Tranactions
+ * @section sec_transaction Transactions
  * Drupal supports transactions, including a transparent fallback for
  * databases that do not support transactions. To start a new transaction,
  * call @code $txn = db_transaction(); @endcode The transaction will
diff --git a/core/includes/errors.inc b/core/includes/errors.inc
index 1048e0e..a0fe0c1 100644
--- a/core/includes/errors.inc
+++ b/core/includes/errors.inc
@@ -185,7 +185,7 @@ function _drupal_log_error($error, $fatal = FALSE) {
   }
   else {
     // Display the message if the current error reporting level allows this type
-    // of message to be displayed, and unconditionnaly in update.php.
+    // of message to be displayed, and unconditionally in update.php.
     if (error_displayable($error)) {
       $class = 'error';
 
diff --git a/core/includes/file.inc b/core/includes/file.inc
index 6ffb269..f576781 100644
--- a/core/includes/file.inc
+++ b/core/includes/file.inc
@@ -652,7 +652,7 @@ function file_htaccess_lines($private = TRUE) {
  *   TRUE if the URI is allowed.
  */
 function file_valid_uri($uri) {
-  // Assert that the URI has an allowed scheme. Barepaths are not allowed.
+  // Assert that the URI has an allowed scheme. Bare paths are not allowed.
   $uri_scheme = file_uri_scheme($uri);
   if (!file_stream_wrapper_valid_scheme($uri_scheme)) {
     return FALSE;
diff --git a/core/includes/install.core.inc b/core/includes/install.core.inc
index f1e0be1..b538cb4 100644
--- a/core/includes/install.core.inc
+++ b/core/includes/install.core.inc
@@ -1196,7 +1196,7 @@ function install_select_language(&$install_state) {
     }
     // If we are performing a non-interactive installation. If only one language
     // (English) is available, assume the user knows what he is doing. Otherwise
-    // thow an error.
+    // throw an error.
     else {
       if (count($files) == 1) {
         $install_state['parameters']['langcode'] = current(array_keys($files));
@@ -1210,7 +1210,7 @@ function install_select_language(&$install_state) {
 }
 
 /**
- * Download a translation file for the selected langaguage.
+ * Download a translation file for the selected language.
  *
  * @param array $install_state
  *   An array of information about the current installation state.
@@ -1227,7 +1227,7 @@ function install_download_translation(&$install_state) {
     return $output;
   }
 
-  // The download was successful, reload the page in the new lanagage.
+  // The download was successful, reload the page in the new language.
   install_goto(install_redirect_url($install_state));
 }
 
diff --git a/core/includes/install.inc b/core/includes/install.inc
index d1c1596..67e24a7 100644
--- a/core/includes/install.inc
+++ b/core/includes/install.inc
@@ -363,7 +363,7 @@ function _drupal_rewrite_settings_is_simple($type, $value) {
  * Helper for drupal_rewrite_settings().
  *
  * Checks whether this token represents a valid array index: a number or a
- * stirng.
+ * string.
  *
  * @param int $type
  *   The token type
diff --git a/core/includes/update.inc b/core/includes/update.inc
index 125907d..a81d20f 100644
--- a/core/includes/update.inc
+++ b/core/includes/update.inc
@@ -315,7 +315,7 @@ function update_get_update_list() {
     // Otherwise, get the list of updates defined by this module.
     $updates = drupal_get_schema_versions($module);
     if ($updates !== FALSE) {
-      // \Drupal::moduleHandler()->invoke() returns NULL for nonexisting hooks,
+      // \Drupal::moduleHandler()->invoke() returns NULL for non-existing hooks,
       // so if no updates are removed, it will == 0.
       $last_removed = \Drupal::moduleHandler()->invoke($module, 'update_last_removed');
       if ($schema_version < $last_removed) {