diff --git a/mailpoet/lib/API/JSON/v1/Settings.php b/mailpoet/lib/API/JSON/v1/Settings.php
index 73a02ba8be..794a62f4e6 100644
--- a/mailpoet/lib/API/JSON/v1/Settings.php
+++ b/mailpoet/lib/API/JSON/v1/Settings.php
@@ -304,7 +304,7 @@ class Settings extends APIEndpoint {
         $response = $this->senderDomainController->getDomainRecords($domain);
       } else {
         return $this->badRequest([
-          APIError::BAD_REQUEST => __($e->getMessage(), 'mailpoet'),
+          APIError::BAD_REQUEST => $e->getMessage(),
         ]);
       }
     }
@@ -333,7 +333,7 @@ class Settings extends APIEndpoint {
         $response = ['ok' => true, 'dns' => $this->senderDomainController->getDomainRecords($domain)];
       } else {
         return $this->badRequest([
-          APIError::BAD_REQUEST => __($e->getMessage(), 'mailpoet'),
+          APIError::BAD_REQUEST => $e->getMessage(),
         ]);
       }
     }
@@ -341,7 +341,7 @@ class Settings extends APIEndpoint {
     if (!$response['ok']) {
       // sender domain verification error. probably an improper setup
       return $this->badRequest([
-        APIError::BAD_REQUEST => __($response['error'] ?? 'failed sender domain verification', 'mailpoet'),
+        APIError::BAD_REQUEST => $response['error'] ?? __('Sender domain verification failed.', 'mailpoet'),
       ], $response);
     }
 
diff --git a/mailpoet/lib/Services/Bridge/API.php b/mailpoet/lib/Services/Bridge/API.php
index 1f45daca5f..aed987dd8b 100644
--- a/mailpoet/lib/Services/Bridge/API.php
+++ b/mailpoet/lib/Services/Bridge/API.php
@@ -266,7 +266,8 @@ class API {
       ];
       $this->loggerFactory->getLogger(LoggerFactory::TOPIC_BRIDGE)->error('createAuthorizedSenderDomain API call failed.', $logData);
 
-      $fallbackError = sprintf(__('An error has happened while performing a request, the server has responded with response code %d'), $code);
+      // translators: %d will be replaced by an error code
+      $fallbackError = sprintf(__('An error has happened while performing a request, the server has responded with response code %d', 'mailpoet'), $code);
 
       $errorData = is_array($responseBody) && isset($responseBody['error']) ? $responseBody['error'] : $fallbackError;
       return ['error' => $errorData, 'status' => false];
@@ -309,7 +310,8 @@ class API {
       ];
       $this->loggerFactory->getLogger(LoggerFactory::TOPIC_BRIDGE)->error('verifyAuthorizedSenderDomain API call failed.', $logData);
 
-      $fallbackError = sprintf(__('An error has happened while performing a request, the server has responded with response code %d'), $code);
+      // translators: %d will be replaced by an error code
+      $fallbackError = sprintf(__('An error has happened while performing a request, the server has responded with response code %d', 'mailpoet'), $code);
 
       $errorData = is_array($responseBody) && isset($responseBody['error']) ? $responseBody['error'] : $fallbackError;
       return ['error' => $errorData, 'status' => false];