Issue #2171015 by webchick: fixed some language/documentation issues.

core/includes/bootstrap.inc

@@ -2429,8 +2429,8 @@ function language_list($flags = Language::STATE_CONFIGURABLE) {
       }
       Language::sort($languages);
     }
-    // If the language module is enable but the configuration has not been
-    // written yet the returning an empty language list will cause errors. For
+    // If the language module is enabled but the configuration has not been
+    // written yet, returning an empty language list will cause errors. For
     // example the cache clear in search_module_preinstall().
     if (empty($languages)) {
       // No language module, so use the default language only.

core/modules/language/lib/Drupal/language/Tests/LanguageListModuleInstallTest.php

@@ -33,8 +33,8 @@ public static function getInfo() {
    * Tests enabling Language.
    */
   function testModuleInstallLanguageList() {
-    // Since language_list uses static caches we need to do this be enabling
-    // the module using a the UI.
+    // Since language_list uses static caches we need to do this by enabling
+    // the module using the UI.
     $admin_user = $this->drupalCreateUser(array('access administration pages', 'administer modules'));
     $this->drupalLogin($admin_user);
     $edit = array();