diff --git a/app/Exceptions/Handler.php b/app/Exceptions/Handler.php
index 4533dac..7d7d19a 100644
--- a/app/Exceptions/Handler.php
+++ b/app/Exceptions/Handler.php
@@ -68,7 +68,7 @@ class Handler extends ExceptionHandler
         {
             $model = strtolower(class_basename($exception->getModel()));
 
-            return $this->errorResponse("Does not exist any instance of {$model} with given id",
+            return $this->errorResponse(trans('errors.model_not_found',['model'=>$model]),
                 Response::HTTP_NOT_FOUND);
         }
 
@@ -105,7 +105,7 @@ class Handler extends ExceptionHandler
             return parent::render($request,$exception);
         }
 
-        return $this->errorResponse('Unexcepted error. Try later',
+        return $this->errorResponse(trans('errors.unexpected_error'),
             Response::HTTP_INTERNAL_SERVER_ERROR);
     }
 }
diff --git a/app/Http/Controllers/CommissionController.php b/app/Http/Controllers/CommissionController.php
index 27759c5..5f784a7 100644
--- a/app/Http/Controllers/CommissionController.php
+++ b/app/Http/Controllers/CommissionController.php
@@ -29,7 +29,7 @@ class CommissionController extends Controller
         $wallet = Wallet::findOrFail($id_wallet);
 
         if($wallet->balance_com <=0 )
-            return $this->errorResponse('Solde de comission est vide' , Response::HTTP_BAD_REQUEST);
+            return $this->errorResponse(trans('messages.empty_com_balance') , Response::HTTP_BAD_REQUEST);
 
         $wallet->balance_princ += $wallet->balance_com;
         $wallet->balance_com = 0;
diff --git a/app/Http/Controllers/CreditController.php b/app/Http/Controllers/CreditController.php
index 3123d92..0314051 100644
--- a/app/Http/Controllers/CreditController.php
+++ b/app/Http/Controllers/CreditController.php
@@ -29,7 +29,7 @@ class CreditController extends Controller
     public function treatDemand($id_demand,Twilio $twilio){
         $demand = DemandeCredit::where('id',$id_demand)->firstOrFail();
         if($demand->status == 1)
-            return $this->errorResponse('Demande deja traitée',Response::HTTP_BAD_REQUEST);
+            return $this->errorResponse(trans('messages.treated_demand'),Response::HTTP_BAD_REQUEST);
 
         $agent = AgentPlus::where('code_membre',$demand->code_membre)->firstOrFail();
         $parrain = AgentPlus::where('code_membre',$demand->code_parrain)->firstOrFail();
@@ -40,7 +40,7 @@ class CreditController extends Controller
         $walletParrain = Wallet::findOrFail($walletAgentParrain->wallet_id);
 
         if($walletParrain->balance_princ < $demand->montant)
-            return $this->errorResponse('Solde principal du parrain inférieur au montant de la demande',Response::HTTP_BAD_REQUEST);
+            return $this->errorResponse(trans('messages.princ_balance_inf_to_demand_amount'),Response::HTTP_BAD_REQUEST);
 
         $walletAgent->balance_princ += $demand->montant;
         $walletParrain->balance_princ -= $demand->montant;
@@ -65,6 +65,6 @@ class CreditController extends Controller
 //        }catch (\Exception $e){
 //            echo "Error: " . $e->getMessage();
 //        }
-        return $this->successResponse('Demande de credit annullée');
+        return $this->successResponse(trans('messages.canceled_demand'));
     }
 }
diff --git a/app/Http/Controllers/WalletController.php b/app/Http/Controllers/WalletController.php
index b0fe7a6..b654855 100644
--- a/app/Http/Controllers/WalletController.php
+++ b/app/Http/Controllers/WalletController.php
@@ -48,7 +48,7 @@ class WalletController extends Controller
         $this->validate($request,$rules);
 
         DB::insert('INSERT INTO  wallets (id_networkAgent) VALUES (?);', [$request->id_networkAgent]);
-        return $this->successResponse('Nouveau wallet ajoute');
+        return $this->successResponse(trans('messages.new_wallet_added'));
 
     }
 }
diff --git a/app/Http/Middleware/Localization.php b/app/Http/Middleware/Localization.php
new file mode 100644
index 0000000..24f09a8
--- /dev/null
+++ b/app/Http/Middleware/Localization.php
@@ -0,0 +1,37 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use Closure;
+use Illuminate\Http\Request;
+
+class Localization
+{
+    /**
+     * Handle an incoming request.
+     *
+     * @param Request $request
+     * @param \Closure $next
+     * @return mixed
+     */
+    public function handle($request, Closure $next)
+    {
+        $enLangs=["en","en-US","en_US","ca","in","gb","GB","us","en-029","en-AU","en-BZ","en-CA","en-GB","en-IE","en-IN","en-JM","en-MY","en-NZ","en-PH","en-SG","en-TT","en-US","en-ZA","en-ZW","au","bz","ie","in","jm","my","nz","ph","sg","tt","za"];
+
+        // Check header request and determine localizaton
+        if ($request->hasHeader('X-localization')){
+           $local = $request->header('X-localization');
+            $pos=strpos($local,"-");
+            if($pos!=false){
+                $local=strtolower(explode("-",$local)[0]);
+            }
+            $local= in_array($local, $enLangs) ? 'en' : 'fr';
+        }else{
+            $local ='fr';
+        }
+        // set laravel localization
+        app()->setLocale($local);
+        // continue request
+        return $next($request);
+    }
+}
diff --git a/bootstrap/app.php b/bootstrap/app.php
index eac240e..0a1b5ee 100644
--- a/bootstrap/app.php
+++ b/bootstrap/app.php
@@ -73,6 +73,7 @@ $app->configure('app');
 */
 
  $app->middleware([
+     App\Http\Middleware\Localization::class,
      App\Http\Middleware\AuthenticateAccess::class
  ]);
 
diff --git a/resources/lang/en/errors.php b/resources/lang/en/errors.php
new file mode 100644
index 0000000..c7e2131
--- /dev/null
+++ b/resources/lang/en/errors.php
@@ -0,0 +1,5 @@
+<?php
+return [
+    'model_not_found' => 'Does not exist any instance of :model with given id',
+    'unexpected_error'=> 'Unexpected error. Try later'
+];
diff --git a/resources/lang/en/messages.php b/resources/lang/en/messages.php
new file mode 100644
index 0000000..7dc3fce
--- /dev/null
+++ b/resources/lang/en/messages.php
@@ -0,0 +1,8 @@
+<?php
+return [
+    'empty_com_balance' => 'Commission balance is empty',
+    'treated_demand' => 'Credit request already processed',
+    'canceled_demand' => 'Canceled credit request',
+    'princ_balance_inf_to_demand_amount' => 'Sponsor\'s principal balance less than the claim amount',
+    'new_wallet_added' => 'New wallet added'
+];
diff --git a/resources/lang/fr/errors.php b/resources/lang/fr/errors.php
new file mode 100644
index 0000000..52e681c
--- /dev/null
+++ b/resources/lang/fr/errors.php
@@ -0,0 +1,5 @@
+<?php
+return [
+    'model_not_found' => 'Il n\'existe aucune instance de :model avec l\'id donné',
+    'unexpected_error'=> 'Erreur inattendue. Essayer plus tard'
+];
diff --git a/resources/lang/fr/messages.php b/resources/lang/fr/messages.php
new file mode 100644
index 0000000..fe41b7f
--- /dev/null
+++ b/resources/lang/fr/messages.php
@@ -0,0 +1,8 @@
+<?php
+return [
+    'empty_com_balance' => 'Solde de commission est vide',
+    'treated_demand' => 'Demande de crédit deja traitée',
+    'canceled_demand' => 'Demande de credit annullée',
+    'princ_balance_inf_to_demand_amount' => 'Solde principal du parrain inférieur au montant de la demande',
+    'new_wallet_added' => 'Nouveau wallet ajouté'
+];