diff --git a/includes/transformer/class-post.php b/includes/transformer/class-post.php
index cc8a1c6..09b79e4 100644
--- a/includes/transformer/class-post.php
+++ b/includes/transformer/class-post.php
@@ -357,7 +357,7 @@ class Post {
 
 		$mentions = $this->get_mentions();
 		if ( $mentions ) {
-			foreach ( $mentions as $mention => $url ) {
+			foreach ( $mentions as $url ) {
 				$cc[] = $url;
 			}
 		}
diff --git a/templates/welcome.php b/templates/welcome.php
index 2eee816..cf26cfe 100644
--- a/templates/welcome.php
+++ b/templates/welcome.php
@@ -87,6 +87,7 @@
 			<?php
 			echo wp_kses(
 				\sprintf(
+					/* translators: the placeholder is the Site Health URL */
 					\__(
 						'If you have problems using this plugin, please check the <a href="%s">Site Health</a> page to ensure that your site is compatible and/or use the "Help" tab (in the top right of the settings pages).',
 						'activitypub'