diff --git a/core/lib/Drupal/Core/Cache/MemoryBackend.php b/core/lib/Drupal/Core/Cache/MemoryBackend.php
index 975493c683..a0269f5301 100644
--- a/core/lib/Drupal/Core/Cache/MemoryBackend.php
+++ b/core/lib/Drupal/Core/Cache/MemoryBackend.php
@@ -100,7 +100,7 @@ public function set($cid, $data, $expire = Cache::PERMANENT, array $tags = []) {
     // Sort the cache tags so that they are stored consistently in the database.
     sort($tags);
 
-    // Do not create an object at this point to minimise the number of objects
+    // Do not create an object at this point to minimize the number of objects
     // garbage collection has to keep a track off.
     $this->cache[$cid] = [
       'cid' => $cid,
diff --git a/core/lib/Drupal/Core/Cache/MemoryCache/MemoryCache.php b/core/lib/Drupal/Core/Cache/MemoryCache/MemoryCache.php
index c6fa20ba98..841e4568a0 100644
--- a/core/lib/Drupal/Core/Cache/MemoryCache/MemoryCache.php
+++ b/core/lib/Drupal/Core/Cache/MemoryCache/MemoryCache.php
@@ -8,7 +8,7 @@
 /**
  * Defines a memory cache implementation.
  *
- * Stores cache items in memory using a PHP array. Cache data is not serialised
+ * Stores cache items in memory using a PHP array. Cache data is not serialized
  * thereby returning the same object as was cached.
  *
  * @ingroup cache
@@ -40,7 +40,7 @@ public function set($cid, $data, $expire = MemoryCacheInterface::CACHE_PERMANENT
     assert(Inspector::assertAllStrings($tags), 'Cache tags must be strings.');
     $tags = array_unique($tags);
 
-    // Do not create an object at this point to minimise the number of objects
+    // Do not create an object at this point to minimize the number of objects
     // garbage collection has to keep a track off.
     $this->cache[$cid] = [
       'cid' => $cid,