diff --git a/lib/offsite_payments/integrations/two_checkout.rb b/lib/offsite_payments/integrations/two_checkout.rb
index 9fdba9822..46c088e6e 100644
--- a/lib/offsite_payments/integrations/two_checkout.rb
+++ b/lib/offsite_payments/integrations/two_checkout.rb
@@ -89,6 +89,9 @@ def initialize(order, account, options = {})
         # Allow referral partners to indicate their shopping cart
         mapping :cart_type, '2co_cart_type'
 
+        # Allow sellers to pass in the hosted checkout language
+        mapping :lang, 'lang'
+
         def customer(params = {})
           add_field(mappings[:customer][:email], params[:email])
           add_field(mappings[:customer][:phone], params[:phone])
diff --git a/test/unit/integrations/two_checkout/two_checkout_helper_test.rb b/test/unit/integrations/two_checkout/two_checkout_helper_test.rb
index ac4c49ecc..f2ccb310e 100644
--- a/test/unit/integrations/two_checkout/two_checkout_helper_test.rb
+++ b/test/unit/integrations/two_checkout/two_checkout_helper_test.rb
@@ -23,12 +23,14 @@ def test_extra_helper_fields
     @helper.return_url 'https://return.url/'
     @helper.cart_type 'shopify'
     @helper.purchase_step 'payment-method'
+    @helper.lang 'en'
 
     assert_field 'currency_code', 'ZAR'
     assert_field 'cart_order_id', '123'
     assert_field 'x_receipt_link_url', 'https://return.url/'
     assert_field '2co_cart_type', 'shopify'
     assert_field 'purchase_step', 'payment-method'
+    assert_field 'lang', 'en'
   end
 
   def test_customer_fields