diff --git a/classes/autoptimizeConfig.php b/classes/autoptimizeConfig.php
index f23e59b0..903d6863 100644
--- a/classes/autoptimizeConfig.php
+++ b/classes/autoptimizeConfig.php
@@ -365,7 +365,9 @@ public function show_config()
 <?php
 $_rapidload_link = 'https://misc.optimizingmatters.com/partners/?from=csssettings&partner=rapidload';
 ?>
-<td><?php echo sprintf( __( 'If Google Pagespeed Insights detects unused CSS, consider using %s to <strong>reduce your site\'s CSS size to up to 90&#37;</strong>, resulting in a slimmer, faster site!', 'autoptimize' ), '<a href="' . $_rapidload_link . '" target="_blank">the premium Rapidload service</a>' ); ?></td>
+<td><?php 
+// translators: the variable contains a link to rapidload.
+echo sprintf( __( 'If Google Pagespeed Insights detects unused CSS, consider using %s to <strong>reduce your site\'s CSS size to up to 90&#37;</strong>, resulting in a slimmer, faster site!', 'autoptimize' ), '<a href="' . $_rapidload_link . '" target="_blank">the premium Rapidload service</a>' ); ?></td>
 </tr>
 <?php } ?>
 </table>
diff --git a/classes/autoptimizeCriticalCSSBase.php b/classes/autoptimizeCriticalCSSBase.php
index a7deb829..372173fc 100644
--- a/classes/autoptimizeCriticalCSSBase.php
+++ b/classes/autoptimizeCriticalCSSBase.php
@@ -359,6 +359,7 @@ public function ao_ccss_interval( $schedules ) {
         // Attach interval to schedule.
         $schedules['ao_ccss'] = array(
             'interval' => $intsec,
+            // translators: the variable contains a string describing the insterval.
             'display'  => sprintf( __( 'Every %s (Autoptimize Crit. CSS)', 'autoptimize' ), $inttxt ),
         );
         return $schedules;
diff --git a/classes/autoptimizeMain.php b/classes/autoptimizeMain.php
index 4f59b1b1..1104a7b6 100644
--- a/classes/autoptimizeMain.php
+++ b/classes/autoptimizeMain.php
@@ -757,6 +757,7 @@ public static function notice_cache_unavailable()
     public static function notice_installed()
     {
         echo '<div class="updated"><p>';
+        // translators: the variables contain opening and closing <a> tags to link to the settings page.
         printf( esc_html__( 'Thank you for installing and activating Autoptimize. Your site is being optimized immediately, please test the frontend to ensure everything still works as expected. If needed you can change JavaScript or CSS optimization settings under %1$sSettings -> Autoptimize%2$s .', 'autoptimize' ), '<a href="options-general.php?page=autoptimize">', '</a>' );
         echo '</p></div>';
     }