diff --git a/app/models/calculator/flat_percent_per_item.rb b/app/models/calculator/flat_percent_per_item.rb
index 17089b2f2c..b18e1026bd 100644
--- a/app/models/calculator/flat_percent_per_item.rb
+++ b/app/models/calculator/flat_percent_per_item.rb
@@ -1,4 +1,5 @@
 require_dependency 'spree/calculator'
+require 'spree/localized_number'
 
 class Calculator::FlatPercentPerItem < Spree::Calculator
   # Spree's FlatPercentItemTotal calculator sums all amounts, and then calculates a percentage
@@ -6,11 +7,14 @@ class Calculator::FlatPercentPerItem < Spree::Calculator
   # In the cart, we display line item individual amounts rounded, so to have consistent
   # calculations we do the same internally. Here, we round adjustments at the individual
   # item level first, then multiply by the item quantity.
+  extend Spree::LocalizedNumber
 
   preference :flat_percent, :decimal, :default => 0
 
   attr_accessible :preferred_flat_percent
 
+  localize_number :preferred_flat_percent
+
   def self.description
     I18n.t(:flat_percent_per_item)
   end
diff --git a/app/models/spree/adjustment_decorator.rb b/app/models/spree/adjustment_decorator.rb
index 71a166aa56..4d0b8421e3 100644
--- a/app/models/spree/adjustment_decorator.rb
+++ b/app/models/spree/adjustment_decorator.rb
@@ -1,5 +1,9 @@
+require 'spree/localized_number'
+
 module Spree
   Adjustment.class_eval do
+    extend Spree::LocalizedNumber
+
     # Deletion of metadata is handled in the database.
     # So we don't need the option `dependent: :destroy` as long as
     # AdjustmentMetadata has no destroy logic itself.
@@ -17,6 +21,8 @@ module Spree
 
     attr_accessible :included_tax
 
+    localize_number :amount
+
     def set_included_tax!(rate)
       tax = amount - (amount / (1 + rate))
       set_absolute_included_tax! tax
@@ -73,6 +79,5 @@ module Spree
 
       result
     end
-
   end
 end
diff --git a/app/models/spree/calculator/flat_percent_item_total_decorator.rb b/app/models/spree/calculator/flat_percent_item_total_decorator.rb
index 9012261dab..0393d300f7 100644
--- a/app/models/spree/calculator/flat_percent_item_total_decorator.rb
+++ b/app/models/spree/calculator/flat_percent_item_total_decorator.rb
@@ -1,5 +1,11 @@
+require 'spree/localized_number'
+
 module Spree
   Calculator::FlatPercentItemTotal.class_eval do
+    extend Spree::LocalizedNumber
+
+    localize_number :preferred_flat_percent
+
     def compute(object)
       item_total = line_items_for(object).map(&:amount).sum
       value = item_total * BigDecimal(self.preferred_flat_percent.to_s) / 100.0
diff --git a/app/models/spree/calculator/flat_rate_decorator.rb b/app/models/spree/calculator/flat_rate_decorator.rb
new file mode 100644
index 0000000000..9208223ee4
--- /dev/null
+++ b/app/models/spree/calculator/flat_rate_decorator.rb
@@ -0,0 +1,9 @@
+require 'spree/localized_number'
+
+module Spree
+  Calculator::FlatRate.class_eval do
+    extend Spree::LocalizedNumber
+
+    localize_number :preferred_amount
+  end
+end
diff --git a/app/models/spree/calculator/flexi_rate_decorator.rb b/app/models/spree/calculator/flexi_rate_decorator.rb
index c4ef6183c2..f583962e07 100644
--- a/app/models/spree/calculator/flexi_rate_decorator.rb
+++ b/app/models/spree/calculator/flexi_rate_decorator.rb
@@ -1,5 +1,12 @@
+require 'spree/localized_number'
+
 module Spree
   Calculator::FlexiRate.class_eval do
+    extend Spree::LocalizedNumber
+
+    localize_number :preferred_first_item,
+                    :preferred_additional_item
+
     def compute(object)
       sum = 0
       max = self.preferred_max_items.to_i
diff --git a/app/models/spree/calculator/per_item_decorator.rb b/app/models/spree/calculator/per_item_decorator.rb
index ebaaf6fc1c..6a87ee2c35 100644
--- a/app/models/spree/calculator/per_item_decorator.rb
+++ b/app/models/spree/calculator/per_item_decorator.rb
@@ -1,5 +1,11 @@
+require 'spree/localized_number'
+
 module Spree
   Calculator::PerItem.class_eval do
+    extend Spree::LocalizedNumber
+
+    localize_number :preferred_amount
+
     def compute(object=nil)
       return 0 if object.nil?
       self.preferred_amount * line_items_for(object).reduce(0) do |sum, value|
diff --git a/app/models/spree/calculator/price_sack_decorator.rb b/app/models/spree/calculator/price_sack_decorator.rb
new file mode 100644
index 0000000000..3176820e68
--- /dev/null
+++ b/app/models/spree/calculator/price_sack_decorator.rb
@@ -0,0 +1,11 @@
+require 'spree/localized_number'
+
+module Spree
+  Calculator::PriceSack.class_eval do
+    extend Spree::LocalizedNumber
+
+    localize_number :preferred_minimal_amount,
+                    :preferred_normal_amount,
+                    :preferred_discount_amount
+  end
+end
diff --git a/app/models/spree/payment_decorator.rb b/app/models/spree/payment_decorator.rb
index c9ae401541..8aab22a7bb 100644
--- a/app/models/spree/payment_decorator.rb
+++ b/app/models/spree/payment_decorator.rb
@@ -1,11 +1,17 @@
+require 'spree/localized_number'
+
 module Spree
   Payment.class_eval do
+    extend Spree::LocalizedNumber
+
     has_one :adjustment, as: :source, dependent: :destroy
 
     after_save :ensure_correct_adjustment, :update_order
 
     attr_accessible :source
 
+    localize_number :amount
+
     def ensure_correct_adjustment
       revoke_adjustment_eligibility if ['failed', 'invalid'].include?(state)
       return if adjustment.try(:finalized?)
diff --git a/app/models/spree/variant_decorator.rb b/app/models/spree/variant_decorator.rb
index c5e5dca1fe..e1b81f6742 100644
--- a/app/models/spree/variant_decorator.rb
+++ b/app/models/spree/variant_decorator.rb
@@ -3,6 +3,7 @@ require 'open_food_network/variant_and_line_item_naming'
 require 'open_food_network/products_cache'
 
 Spree::Variant.class_eval do
+  extend Spree::LocalizedNumber
   # Remove method From Spree, so method from the naming module is used instead
   # This file may be double-loaded in delayed job environment, so we check before
   # removing the Spree method to prevent error.
@@ -55,6 +56,8 @@ Spree::Variant.class_eval do
       .where("o_inventory_items.id IS NULL OR o_inventory_items.visible = (?)", true)
   }
 
+  localize_number :price, :cost_price, :weight
+
   # Define sope as class method to allow chaining with other scopes filtering id.
   # In Rails 3, merging two scopes on the same column will consider only the last scope.
   def self.in_distributor(distributor)
diff --git a/app/models/variant_override.rb b/app/models/variant_override.rb
index c713361b89..453a93f7b4 100644
--- a/app/models/variant_override.rb
+++ b/app/models/variant_override.rb
@@ -1,4 +1,6 @@
 class VariantOverride < ActiveRecord::Base
+  extend Spree::LocalizedNumber
+
   acts_as_taggable
 
   belongs_to :hub, class_name: 'Enterprise'
@@ -17,6 +19,8 @@ class VariantOverride < ActiveRecord::Base
     where(hub_id: hubs)
   }
 
+  localize_number :price
+
   def self.indexed(hub)
     Hash[
       for_hubs(hub).preload(:variant).map { |vo| [vo.variant, vo] }