diff --git a/app/modules/loyalty/static/admin/js/loyalty-analytics.js b/app/modules/loyalty/static/admin/js/loyalty-analytics.js
index 91d6f9b9..b8dfdd17 100644
--- a/app/modules/loyalty/static/admin/js/loyalty-analytics.js
+++ b/app/modules/loyalty/static/admin/js/loyalty-analytics.js
@@ -188,7 +188,7 @@ function adminLoyaltyAnalytics() {
 
         formatNumber(num) {
             if (num === null || num === undefined) return '0';
-            return new Intl.NumberFormat('en-US').format(num);
+            return new Intl.NumberFormat(I18n.locale).format(num);
         }
     };
 }
diff --git a/app/modules/loyalty/static/admin/js/loyalty-merchant-detail.js b/app/modules/loyalty/static/admin/js/loyalty-merchant-detail.js
index 7c089220..96fda0ec 100644
--- a/app/modules/loyalty/static/admin/js/loyalty-merchant-detail.js
+++ b/app/modules/loyalty/static/admin/js/loyalty-merchant-detail.js
@@ -255,7 +255,7 @@ function adminLoyaltyMerchantDetail() {
             if (!dateString) return 'N/A';
             try {
                 const date = new Date(dateString);
-                return date.toLocaleDateString('en-US', {
+                return date.toLocaleDateString(I18n.locale, {
                     year: 'numeric',
                     month: 'short',
                     day: 'numeric'
@@ -269,7 +269,7 @@ function adminLoyaltyMerchantDetail() {
         // Format number with thousands separator
         formatNumber(num) {
             if (num === null || num === undefined) return '0';
-            return new Intl.NumberFormat('en-US').format(num);
+            return new Intl.NumberFormat(I18n.locale).format(num);
         },
 
         // Transaction categories
diff --git a/app/modules/loyalty/static/admin/js/loyalty-programs.js b/app/modules/loyalty/static/admin/js/loyalty-programs.js
index 95fdf8ca..c92293d2 100644
--- a/app/modules/loyalty/static/admin/js/loyalty-programs.js
+++ b/app/modules/loyalty/static/admin/js/loyalty-programs.js
@@ -325,7 +325,7 @@ function adminLoyaltyPrograms() {
             if (!dateString) return 'N/A';
             try {
                 const date = new Date(dateString);
-                return date.toLocaleDateString('en-US', {
+                return date.toLocaleDateString(I18n.locale, {
                     year: 'numeric',
                     month: 'short',
                     day: 'numeric'
@@ -339,7 +339,7 @@ function adminLoyaltyPrograms() {
         // Format number with thousands separator
         formatNumber(num) {
             if (num === null || num === undefined) return '0';
-            return new Intl.NumberFormat('en-US').format(num);
+            return new Intl.NumberFormat(I18n.locale).format(num);
         }
     };
 }
diff --git a/app/modules/loyalty/static/merchant/js/loyalty-analytics.js b/app/modules/loyalty/static/merchant/js/loyalty-analytics.js
index 2b155918..9598a255 100644
--- a/app/modules/loyalty/static/merchant/js/loyalty-analytics.js
+++ b/app/modules/loyalty/static/merchant/js/loyalty-analytics.js
@@ -98,7 +98,7 @@ function merchantLoyaltyAnalytics() {
 
         formatNumber(num) {
             if (num === null || num === undefined) return '0';
-            return new Intl.NumberFormat('en-US').format(num);
+            return new Intl.NumberFormat(I18n.locale).format(num);
         }
     };
 }
diff --git a/app/modules/loyalty/static/store/js/loyalty-analytics.js b/app/modules/loyalty/static/store/js/loyalty-analytics.js
index 59a11379..1855a772 100644
--- a/app/modules/loyalty/static/store/js/loyalty-analytics.js
+++ b/app/modules/loyalty/static/store/js/loyalty-analytics.js
@@ -174,7 +174,7 @@ function storeLoyaltyAnalytics() {
 
         formatNumber(num) {
             if (num === null || num === undefined) return '0';
-            return new Intl.NumberFormat('en-US').format(num);
+            return new Intl.NumberFormat(I18n.locale).format(num);
         }
     };
 }
diff --git a/app/modules/loyalty/static/store/js/loyalty-terminal.js b/app/modules/loyalty/static/store/js/loyalty-terminal.js
index e6dcc314..c5e3466c 100644
--- a/app/modules/loyalty/static/store/js/loyalty-terminal.js
+++ b/app/modules/loyalty/static/store/js/loyalty-terminal.js
@@ -399,7 +399,7 @@ function storeLoyaltyTerminal() {
 
         formatNumber(num) {
             if (num === null || num === undefined) return '0';
-            return new Intl.NumberFormat('en-US').format(num);
+            return new Intl.NumberFormat(I18n.locale).format(num);
         },
 
         // Format time
@@ -407,7 +407,7 @@ function storeLoyaltyTerminal() {
             if (!dateString) return '-';
             try {
                 const date = new Date(dateString);
-                return date.toLocaleTimeString('en-US', {
+                return date.toLocaleTimeString(I18n.locale, {
                     hour: '2-digit',
                     minute: '2-digit'
                 });
diff --git a/app/modules/loyalty/static/storefront/js/loyalty-dashboard.js b/app/modules/loyalty/static/storefront/js/loyalty-dashboard.js
index 2cbfd167..0f9240b3 100644
--- a/app/modules/loyalty/static/storefront/js/loyalty-dashboard.js
+++ b/app/modules/loyalty/static/storefront/js/loyalty-dashboard.js
@@ -73,13 +73,13 @@ function customerLoyaltyDashboard() {
 
         formatNumber(num) {
             if (num == null) return '0';
-            return new Intl.NumberFormat('en-US').format(num);
+            return new Intl.NumberFormat(I18n.locale).format(num);
         },
 
         formatDate(dateString) {
             if (!dateString) return '-';
             try {
-                return new Date(dateString).toLocaleDateString('en-US', {
+                return new Date(dateString).toLocaleDateString(I18n.locale, {
                     year: 'numeric',
                     month: 'short',
                     day: 'numeric'
diff --git a/app/modules/loyalty/static/storefront/js/loyalty-history.js b/app/modules/loyalty/static/storefront/js/loyalty-history.js
index 8bbe440a..798f32ab 100644
--- a/app/modules/loyalty/static/storefront/js/loyalty-history.js
+++ b/app/modules/loyalty/static/storefront/js/loyalty-history.js
@@ -93,13 +93,13 @@ function customerLoyaltyHistory() {
 
         formatNumber(num) {
             if (num == null) return '0';
-            return new Intl.NumberFormat('en-US').format(num);
+            return new Intl.NumberFormat(I18n.locale).format(num);
         },
 
         formatDateTime(dateString) {
             if (!dateString) return '-';
             try {
-                return new Date(dateString).toLocaleString('en-US', {
+                return new Date(dateString).toLocaleString(I18n.locale, {
                     year: 'numeric',
                     month: 'short',
                     day: 'numeric',