diff --git a/app/Http/Controllers/LicenseController.php b/app/Http/Controllers/LicenseController.php
index f812f897951c..4549203ce418 100644
--- a/app/Http/Controllers/LicenseController.php
+++ b/app/Http/Controllers/LicenseController.php
@@ -134,7 +134,7 @@ class LicenseController extends BaseController
         }
 
         $error = [
-            'message' => 'Invalid license, or invalid environment '.config('ninja.environment'),
+            'message' => ctrans('texts.invoice_license_or_environment', ['environment' => config('ninja.environment')]),
             'errors' => new stdClass,
         ];
 
diff --git a/app/Http/Controllers/PingController.php b/app/Http/Controllers/PingController.php
index 45a5d52ffd4b..5764a769c8dd 100644
--- a/app/Http/Controllers/PingController.php
+++ b/app/Http/Controllers/PingController.php
@@ -74,7 +74,7 @@ class PingController extends BaseController
     public function health()
     {
         if (Ninja::isNinja()) {
-            return response()->json(['message' => 'Route not available', 'errors'=>[]], 403);
+            return response()->json(['message' => ctrans('texts.route_not_available'), 'errors'=>[]], 403);
         }
 
         return response()->json(SystemHealth::check(), 200);
diff --git a/app/Http/Controllers/PreviewController.php b/app/Http/Controllers/PreviewController.php
index 16e0372021e3..182dcb0c9348 100644
--- a/app/Http/Controllers/PreviewController.php
+++ b/app/Http/Controllers/PreviewController.php
@@ -81,7 +81,7 @@ class PreviewController extends BaseController
             $design_object = json_decode(json_encode(request()->input('design')));
 
             if (! is_object($design_object)) {
-                return response()->json(['message' => 'Invalid custom design object'], 400);
+                return response()->json(['message' => ctrans('texts.invalid_design_object')], 400);
             }
 
             $entity = ucfirst(request()->input('entity'));
diff --git a/app/Http/Controllers/QuoteController.php b/app/Http/Controllers/QuoteController.php
index 0aca87c000d2..d80d5b244c7a 100644
--- a/app/Http/Controllers/QuoteController.php
+++ b/app/Http/Controllers/QuoteController.php
@@ -507,7 +507,7 @@ class QuoteController extends BaseController
         $quotes = Quote::withTrashed()->whereIn('id', $this->transformKeys($ids))->company()->get();
 
         if (! $quotes) {
-            return response()->json(['message' => 'No Quote/s Found']);
+            return response()->json(['message' => ctrans('texts.quote_not_found')]);
         }
 
         /*
@@ -517,13 +517,13 @@ class QuoteController extends BaseController
         if ($action == 'download' && $quotes->count() >= 1) {
             $quotes->each(function ($quote) {
                 if (auth()->user()->cannot('view', $quote)) {
-                    return response()->json(['message'=>'Insufficient privileges to access quote '.$quote->number]);
+                    return response()->json(['message'=> ctrans('texts.access_denied')]);
                 }
             });
 
             ZipInvoices::dispatch($quotes, $quotes->first()->company, auth()->user()->email);
 
-            return response()->json(['message' => 'Email Sent!'], 200);
+            return response()->json(['message' => ctrans('texts.sent_message')], 200);
         }
 
         if ($action == 'convert') {
@@ -651,7 +651,7 @@ class QuoteController extends BaseController
             case 'approve':
             //make sure it hasn't already been approved!!
                 if ($quote->status_id != Quote::STATUS_SENT) {
-                    return response()->json(['message' => 'Unable to approve this quote as it has expired.'], 400);
+                    return response()->json(['message' => ctrans('texts.quote_unapprovable')], 400);
                 }
 
                 return $this->itemResponse($quote->service()->approve()->save());
@@ -692,7 +692,7 @@ class QuoteController extends BaseController
             case 'email':
                 $quote->service()->sendEmail();
 
-                return response()->json(['message'=>'email sent'], 200);
+                return response()->json(['message'=> ctrans('texts.sent_message')], 200);
                 break;
             case 'mark_sent':
                 $quote->service()->markSent()->save();
@@ -702,7 +702,7 @@ class QuoteController extends BaseController
                 }
                 break;
             default:
-                return response()->json(['message' => "The requested action `{$action}` is not available."], 400);
+                return response()->json(['message' => ctrans('texts.action_unavailable',['action' => $action])], 400);
                 break;
         }
     }
diff --git a/resources/lang/en/texts.php b/resources/lang/en/texts.php
index 065694498879..115b19f1f995 100644
--- a/resources/lang/en/texts.php
+++ b/resources/lang/en/texts.php
@@ -3419,5 +3419,9 @@ return [
     'no_group_settings_found' => 'No group settings found',
     'access_denied' => 'Insufficient privileges to access/modify this resource',
     'invoice_cannot_be_marked_paid' => 'Invoice cannot be marked as paid',
-
+    'invoice_license_or_environment' => 'Invalid license, or invalid environment :environment',
+    'route_not_available' => 'Route not available',
+    'invalid_design_object' => 'Invalid custom design object',
+    'quote_not_found' => 'Quote/s not found',
+    'quote_unapprovable' => 'Unable to approve this quote as it has expired.',
 ];