Add instance switch to enable number localization

app/models/spree/app_configuration_decorator.rb

@@ -42,4 +42,7 @@ Spree::AppConfiguration.class_eval do
 
   # Stripe Connect
   preference :stripe_connect_enabled, :boolean, default: false
+
+  # Number localization
+  preference :enable_localized_number?, :boolean, default: false
 end

app/overrides/spree/admin/general_settings/edit/number_localization.html.haml.deface

@@ -0,0 +1,7 @@
+/ insert_after "fieldset.currency"
+
+%fieldset.number_localization.no-border-bottom
+  %legend{:align => "center"}= t('admin.number_localization.number_localization_settings')
+  .field
+    = preference_field_tag(:enable_localized_number?, Spree::Config[:enable_localized_number?], type: Spree::Config.preference_type(:enable_localized_number?))
+    = label_tag(:enable_localized_number?, t('admin.number_localization.enable_localized_number')) + tag(:br)

config/locales/en.yml

@@ -252,6 +252,10 @@ en:
       enable_embedded_shopfronts: "Enable Embedded Shopfronts"
       embedded_shopfronts_whitelist: "External Domains Whitelist"
 
+    number_localization:
+      number_localization_settings: "Number Localization Settings"
+      enable_localized_number: "Use the international thousand/decimal separator logic"
+
     business_model_configuration:
       edit:
         business_model_configuration: "Business Model"

lib/spree/localized_number.rb

@@ -14,12 +14,14 @@ module Spree
         old_setter = instance_method(setter) if table_exists? && !column_names.include?(attribute.to_s)
 
         define_method(setter) do |number|
-          if Spree::LocalizedNumber.valid_localizable_number?(number)
-            number = Spree::LocalizedNumber.parse(number)
-          else
-            @invalid_localized_number ||= []
-            @invalid_localized_number << attribute
-            number = nil
+          if Spree::Config.enable_localized_number?
+            if Spree::LocalizedNumber.valid_localizable_number?(number)
+              number = Spree::LocalizedNumber.parse(number)
+            else
+              @invalid_localized_number ||= []
+              @invalid_localized_number << attribute
+              number = nil
+            end
           end
 
           if has_attribute?(attribute)
@@ -30,6 +32,8 @@ module Spree
         end
 
         define_method(:validate_localizable_number) do
+          return unless Spree::Config.enable_localized_number?
+
           @invalid_localized_number.andand.each do |error_attribute|
             errors.set(error_attribute, [I18n.t('spree.localized_number.invalid_format')])
           end