diff --git a/CRM/Extension/Downloader.php b/CRM/Extension/Downloader.php
index 23a4c422e1a1..f06fba6e8a31 100644
--- a/CRM/Extension/Downloader.php
+++ b/CRM/Extension/Downloader.php
@@ -105,7 +105,7 @@ public function download($key, $downloadUrl) {
     $destDir = $this->containerDir . DIRECTORY_SEPARATOR . $key;
 
     if (!$downloadUrl) {
-      CRM_Core_Error::fatal('Cannot install this extension - downloadUrl is not set!');
+      CRM_Core_Error::fatal(ts('Cannot install this extension - downloadUrl is not set!'));
     }
 
     if (!$this->fetch($downloadUrl, $filename)) {
@@ -213,7 +213,7 @@ public function validateFiles($key, $extractedZipPath) {
     }
 
     if ($newInfo->key != $key) {
-      CRM_Core_Error::fatal('Cannot install - there are differences between extdir XML file and archive XML file!');
+      CRM_Core_Error::fatal(ts('Cannot install - there are differences between extdir XML file and archive XML file!'));
     }
 
     return TRUE;
diff --git a/CRM/Extension/Manager/Payment.php b/CRM/Extension/Manager/Payment.php
index a7c787609e3a..f8b7ec092718 100644
--- a/CRM/Extension/Manager/Payment.php
+++ b/CRM/Extension/Manager/Payment.php
@@ -39,12 +39,12 @@ public function onPreInstall(CRM_Extension_Info $info) {
     $paymentProcessorTypes = $this->_getAllPaymentProcessorTypes('class_name');
 
     if (array_key_exists($info->key, $paymentProcessorTypes)) {
-      CRM_Core_Error::fatal('This payment processor type is already installed.');
+      CRM_Core_Error::fatal(ts('This payment processor type is already installed.'));
     }
 
     $ppByName = $this->_getAllPaymentProcessorTypes('name');
     if (array_key_exists($info->name, $ppByName)) {
-      CRM_Core_Error::fatal('This payment processor type already exists.');
+      CRM_Core_Error::fatal(ts('This payment processor type already exists.'));
     }
 
     $dao = new CRM_Financial_DAO_PaymentProcessorType();
@@ -82,7 +82,7 @@ public function onPreInstall(CRM_Extension_Info $info) {
         break;
 
       default:
-        CRM_Core_Error::fatal('Billing mode in info file has wrong value.');
+        CRM_Core_Error::fatal(ts('Billing mode in info file has wrong value.'));
     }
 
     $dao->is_recur = trim($info->typeInfo['isRecur']);
@@ -108,7 +108,7 @@ public function onPostInstall(CRM_Extension_Info $info) {
   public function onPreUninstall(CRM_Extension_Info $info) {
     $paymentProcessorTypes = $this->_getAllPaymentProcessorTypes('class_name');
     if (!array_key_exists($info->key, $paymentProcessorTypes)) {
-      CRM_Core_Error::fatal('This payment processor type is not registered.');
+      CRM_Core_Error::fatal(ts('This payment processor type is not registered.'));
     }
 
     $dao = new CRM_Financial_DAO_PaymentProcessor();
diff --git a/CRM/Extension/Manager/Report.php b/CRM/Extension/Manager/Report.php
index 1ad82f371cb9..eeba44919b7a 100644
--- a/CRM/Extension/Manager/Report.php
+++ b/CRM/Extension/Manager/Report.php
@@ -37,7 +37,7 @@ public function __construct() {
   public function onPreInstall(CRM_Extension_Info $info) {
     $customReports = $this->getCustomReportsByName();
     if (array_key_exists($info->key, $customReports)) {
-      CRM_Core_Error::fatal('This report is already registered.');
+      CRM_Core_Error::fatal(ts('This report is already registered.'));
     }
 
     if ($info->typeInfo['component'] === 'Contact') {
@@ -48,7 +48,7 @@ public function onPreInstall(CRM_Extension_Info $info) {
       $compId = $comp->componentID;
     }
     if (empty($compId)) {
-      CRM_Core_Error::fatal("Component for which you're trying to install the extension (" . $info->typeInfo['component'] . ") is currently disabled.");
+      CRM_Core_Error::fatal(ts('Component for which you are trying to install the extension (%1) is currently disabled.', [1 => $info->typeInfo['component']]));
     }
     $weight = CRM_Utils_Weight::getDefaultWeight('CRM_Core_DAO_OptionValue',
       ['option_group_id' => $this->groupId]
diff --git a/CRM/Extension/Manager/Search.php b/CRM/Extension/Manager/Search.php
index 99797cacf034..3fc8167c9ac7 100644
--- a/CRM/Extension/Manager/Search.php
+++ b/CRM/Extension/Manager/Search.php
@@ -38,7 +38,7 @@ public function __construct() {
   public function onPreInstall(CRM_Extension_Info $info) {
     $customSearchesByName = $this->getCustomSearchesByName();
     if (array_key_exists($info->key, $customSearchesByName)) {
-      CRM_Core_Error::fatal('This custom search is already registered.');
+      CRM_Core_Error::fatal(ts('This custom search is already registered.'));
     }
 
     $weight = CRM_Utils_Weight::getDefaultWeight('CRM_Core_DAO_OptionValue',