diff --git a/wp-admin/includes/media.php b/wp-admin/includes/media.php
index 2ef4a75d79..ef7e3a929d 100644
--- a/wp-admin/includes/media.php
+++ b/wp-admin/includes/media.php
@@ -807,7 +807,7 @@ function image_attachment_fields_to_edit($form_fields, $post) {
 
 		$form_fields['image_alt'] = array(
 			'value' => $alt,
-			'label' => __('Alternate Text'),
+			'label' => __('Alternative Text'),
 			'helps' => __('Alt text for the image, e.g. “The Mona Lisa”')
 		);
 
@@ -1975,7 +1975,7 @@ function wp_media_insert_url_form( $default_view = 'image' ) {
 
 		<tr class="image-only">
 			<th valign="top" scope="row" class="label">
-				<span class="alignleft"><label for="alt">' . __('Alternate Text') . '</label></span>
+				<span class="alignleft"><label for="alt">' . __('Alternative Text') . '</label></span>
 			</th>
 			<td class="field"><input id="alt" name="alt" value="" type="text" aria-required="true" />
 			<p class="help">' . __('Alt text for the image, e.g. &#8220;The Mona Lisa&#8221;') . '</p></td>
diff --git a/wp-includes/js/tinymce/langs/wp-langs.php b/wp-includes/js/tinymce/langs/wp-langs.php
index 1f702ddc7b..9de90c2e0b 100644
--- a/wp-includes/js/tinymce/langs/wp-langs.php
+++ b/wp-includes/js/tinymce/langs/wp-langs.php
@@ -546,7 +546,7 @@ function wp_mce_translation() {
 		's130' => __('130%'),
 		'img_title' => __('Title'),
 		'caption' => __('Caption'),
-		'alt' => __('Alternate Text')
+		'alt' => __('Alternative Text')
 	);
 
 	$locale = _WP_Editors::$mce_locale;
diff --git a/wp-includes/pluggable.php b/wp-includes/pluggable.php
index 94e505dcdf..3a8e639245 100644
--- a/wp-includes/pluggable.php
+++ b/wp-includes/pluggable.php
@@ -1578,7 +1578,7 @@ if ( !function_exists( 'get_avatar' ) ) :
  * @param int|string|object $id_or_email A user ID,  email address, or comment object
  * @param int $size Size of the avatar image
  * @param string $default URL to a default image to use if no avatar is available
- * @param string $alt Alternate text to use in image tag. Defaults to blank
+ * @param string $alt Alternative text to use in image tag. Defaults to blank
  * @return string <img> tag for the user's avatar
 */
 function get_avatar( $id_or_email, $size = '96', $default = '', $alt = false ) {