diff --git a/lib/API/MP/v1/API.php b/lib/API/MP/v1/API.php
index 7810808518..abe4c16de3 100644
--- a/lib/API/MP/v1/API.php
+++ b/lib/API/MP/v1/API.php
@@ -84,7 +84,7 @@ class API {
     // throw exception when none of the segments exist
     $found_segments = Segment::whereIn('id', $segments_ids)->findMany();
     if (!$found_segments) {
-      $exception = WPFunctions::get()->n('This list does not exist.', 'These lists do not exist.', count($segments_ids), 'mailpoet');
+      $exception = WPFunctions::get()->_n('This list does not exist.', 'These lists do not exist.', count($segments_ids), 'mailpoet');
       throw new \Exception($exception);
     }
 
@@ -104,7 +104,7 @@ class API {
     if (count($found_segments_ids) !== count($segments_ids)) {
       $missing_ids = array_values(array_diff($segments_ids, $found_segments_ids));
       $exception = sprintf(
-        WPFunctions::get()->n('List with ID %s does not exist.', 'Lists with IDs %s do not exist.', count($missing_ids), 'mailpoet'),
+        WPFunctions::get()->_n('List with ID %s does not exist.', 'Lists with IDs %s do not exist.', count($missing_ids), 'mailpoet'),
         implode(', ', $missing_ids)
       );
       throw new \Exception(sprintf($exception, implode(', ', $missing_ids)));
@@ -152,7 +152,7 @@ class API {
     // throw exception when none of the segments exist
     $found_segments = Segment::whereIn('id', $segments_ids)->findMany();
     if (!$found_segments) {
-      $exception = WPFunctions::get()->n('This list does not exist.', 'These lists do not exist.', count($segments_ids), 'mailpoet');
+      $exception = WPFunctions::get()->_n('This list does not exist.', 'These lists do not exist.', count($segments_ids), 'mailpoet');
       throw new \Exception($exception);
     }
 
@@ -172,7 +172,7 @@ class API {
     if (count($found_segments_ids) !== count($segments_ids)) {
       $missing_ids = array_values(array_diff($segments_ids, $found_segments_ids));
       $exception = sprintf(
-        WPFunctions::get()->n('List with ID %s does not exist.', 'Lists with IDs %s do not exist.', count($missing_ids), 'mailpoet'),
+        WPFunctions::get()->_n('List with ID %s does not exist.', 'Lists with IDs %s do not exist.', count($missing_ids), 'mailpoet'),
         implode(', ', $missing_ids)
       );
       throw new \Exception($exception);
diff --git a/lib/Config/Menu.php b/lib/Config/Menu.php
index e01810eeaa..ec00fe98c6 100644
--- a/lib/Config/Menu.php
+++ b/lib/Config/Menu.php
@@ -156,7 +156,7 @@ class Menu {
     // add limit per page to screen options
     $this->wp->addAction('load-' . $newsletters_page, function() {
       $this->wp->addScreenOption('per_page', [
-        'label' => $this->wp->x(
+        'label' => $this->wp->_x(
           'Number of newsletters per page',
           'newsletters per page (screen options)',
           'mailpoet'
@@ -194,7 +194,7 @@ class Menu {
     // add limit per page to screen options
     $this->wp->addAction('load-' . $forms_page, function() {
       $this->wp->addScreenOption('per_page', [
-        'label' => $this->wp->x(
+        'label' => $this->wp->_x(
           'Number of forms per page',
           'forms per page (screen options)',
           'mailpoet'
@@ -232,7 +232,7 @@ class Menu {
     // add limit per page to screen options
     $this->wp->addAction('load-' . $subscribers_page, function() {
       $this->wp->addScreenOption('per_page', [
-        'label' => $this->wp->x(
+        'label' => $this->wp->_x(
           'Number of subscribers per page',
           'subscribers per page (screen options)',
           'mailpoet'
@@ -283,7 +283,7 @@ class Menu {
     // add limit per page to screen options
     $this->wp->addAction('load-' . $segments_page, function() {
       $this->wp->addScreenOption('per_page', [
-        'label' => $this->wp->x(
+        'label' => $this->wp->_x(
           'Number of segments per page',
           'segments per page (screen options)',
           'mailpoet'
diff --git a/lib/Config/Populator.php b/lib/Config/Populator.php
index d9fce62b71..d838ae3f46 100644
--- a/lib/Config/Populator.php
+++ b/lib/Config/Populator.php
@@ -243,7 +243,7 @@ class Populator {
     if (empty($woocommerce_optin_on_checkout)) {
       $this->settings->set('woocommerce.optin_on_checkout', [
         'enabled' => empty($settings_db_version), // enable on new installs only
-        'message' => WPFunctions::get()->x('Yes, I would like to be added to your mailing list', "default email opt-in message displayed on checkout page for ecommerce websites"),
+        'message' => WPFunctions::get()->_x('Yes, I would like to be added to your mailing list', "default email opt-in message displayed on checkout page for ecommerce websites"),
       ]);
     }
 
diff --git a/lib/Config/PopulatorData/DefaultForm.php b/lib/Config/PopulatorData/DefaultForm.php
index 39fee3431d..11139b3ac1 100644
--- a/lib/Config/PopulatorData/DefaultForm.php
+++ b/lib/Config/PopulatorData/DefaultForm.php
@@ -10,32 +10,32 @@ use MailPoet\WP\Functions as WPFunctions;
 class DefaultForm {
 
   public function getName() {
-    return WPFunctions::get()->x('A GDPR friendly form', 'default name of form (GDPR friendly) to capture emails', 'mailpoet');
+    return WPFunctions::get()->_x('A GDPR friendly form', 'default name of form (GDPR friendly) to capture emails', 'mailpoet');
   }
 
   public function getBody() {
     return [
       [
         'type' => 'text',
-        'name' => WPFunctions::get()->x('First name', 'Form label', 'mailpoet'),
+        'name' => WPFunctions::get()->_x('First name', 'Form label', 'mailpoet'),
         'id' => 'first_name',
         'unique' => '1',
         'static' => '0',
-        'params' => ['label' => WPFunctions::get()->x('First name', 'Form label', 'mailpoet')],
+        'params' => ['label' => WPFunctions::get()->_x('First name', 'Form label', 'mailpoet')],
         'position' => '1',
       ],
       [
         'type' => 'text',
-        'name' => WPFunctions::get()->x('Email', 'Form label', 'mailpoet'),
+        'name' => WPFunctions::get()->_x('Email', 'Form label', 'mailpoet'),
         'id' => 'email',
         'unique' => '0',
         'static' => '1',
-        'params' => ['label' => WPFunctions::get()->x('Email', 'Form label', 'mailpoet'), 'required' => 'true'],
+        'params' => ['label' => WPFunctions::get()->_x('Email', 'Form label', 'mailpoet'), 'required' => 'true'],
         'position' => '2',
       ],
       [
         'type' => 'html',
-        'name' => WPFunctions::get()->x('Custom text or HTML', 'Form label', 'mailpoet'),
+        'name' => WPFunctions::get()->_x('Custom text or HTML', 'Form label', 'mailpoet'),
         'id' => 'html',
         'unique' => '0',
         'static' => '0',
@@ -47,11 +47,11 @@ class DefaultForm {
       ],
       [
         'type' => 'submit',
-        'name' => WPFunctions::get()->x('Submit', 'Form label', 'mailpoet'),
+        'name' => WPFunctions::get()->_x('Submit', 'Form label', 'mailpoet'),
         'id' => 'submit',
         'unique' => '0',
         'static' => '1',
-        'params' => ['label' => WPFunctions::get()->x('Subscribe!', 'Form label', 'mailpoet')],
+        'params' => ['label' => WPFunctions::get()->_x('Subscribe!', 'Form label', 'mailpoet')],
         'position' => '4',
       ],
     ];
diff --git a/lib/Form/Widget.php b/lib/Form/Widget.php
index 54127b5189..7d0031fc87 100644
--- a/lib/Form/Widget.php
+++ b/lib/Form/Widget.php
@@ -200,7 +200,7 @@ EOL;
     // get forms list
     $forms = Form::getPublished()->orderByAsc('name')->findArray();
     ?><p>
-      <label for="<?php $this->get_field_id( 'title' ) ?>"><?php WPFunctions::get()->e('Title:', 'mailpoet'); ?></label>
+      <label for="<?php $this->get_field_id( 'title' ) ?>"><?php WPFunctions::get()->_e('Title:', 'mailpoet'); ?></label>
       <input
         type="text"
         class="widefat"
@@ -220,7 +220,7 @@ EOL;
       </select>
     </p>
     <p>
-      <a href="javascript:;" onClick="createSubscriptionForm()" class="mailpoet_form_new"><?php WPFunctions::get()->e('Create a new form', 'mailpoet'); ?></a>
+      <a href="javascript:;" onClick="createSubscriptionForm()" class="mailpoet_form_new"><?php WPFunctions::get()->_e('Create a new form', 'mailpoet'); ?></a>
     </p>
     <script type="text/javascript">
     function createSubscriptionForm() {
diff --git a/lib/Subscribers/ImportExport/ImportExportFactory.php b/lib/Subscribers/ImportExport/ImportExportFactory.php
index 31d347e147..e3ceddb9d1 100644
--- a/lib/Subscribers/ImportExport/ImportExportFactory.php
+++ b/lib/Subscribers/ImportExport/ImportExportFactory.php
@@ -51,8 +51,8 @@ class ImportExportFactory {
       $fields = array_merge(
         $fields,
         [
-          'list_status' => WPFunctions::get()->x('List status', 'Subscription status', 'mailpoet'),
-          'global_status' => WPFunctions::get()->x('Global status', 'Subscription status', 'mailpoet'),
+          'list_status' => WPFunctions::get()->_x('List status', 'Subscription status', 'mailpoet'),
+          'global_status' => WPFunctions::get()->_x('Global status', 'Subscription status', 'mailpoet'),
           'subscribed_ip' => WPFunctions::get()->__('IP address', 'mailpoet'),
         ]
       );
diff --git a/lib/WP/Functions.php b/lib/WP/Functions.php
index a10f8db406..99bea58eaf 100644
--- a/lib/WP/Functions.php
+++ b/lib/WP/Functions.php
@@ -54,15 +54,15 @@ class Functions {
     return __($text, $domain);
   }
 
-  function e($text, $domain = 'default') {
+  function _e($text, $domain = 'default') {
     return _e($text, $domain);
   }
 
-  function n($single, $plural, $number, $domain = 'default') {
+  function _n($single, $plural, $number, $domain = 'default') {
     return _n($single, $plural, $number, $domain);
   }
 
-  function x($text, $context, $domain = 'default') {
+  function _x($text, $context, $domain = 'default') {
     return _x($text, $context, $domain);
   }