diff --git a/CRM/Admin/Form/Setting/Localization.php b/CRM/Admin/Form/Setting/Localization.php
index 4273e9b98f55..d18e75ab718f 100644
--- a/CRM/Admin/Form/Setting/Localization.php
+++ b/CRM/Admin/Form/Setting/Localization.php
@@ -32,6 +32,7 @@ class CRM_Admin_Form_Setting_Localization extends CRM_Admin_Form_Setting {
     'inheritLocale' => CRM_Core_BAO_Setting::LOCALIZATION_PREFERENCES_NAME,
     'lcMessages' => CRM_Core_BAO_Setting::LOCALIZATION_PREFERENCES_NAME,
     'legacyEncoding' => CRM_Core_BAO_Setting::LOCALIZATION_PREFERENCES_NAME,
+    'format_locale' => CRM_Core_BAO_Setting::LOCALIZATION_PREFERENCES_NAME,
     'monetaryThousandSeparator' => CRM_Core_BAO_Setting::LOCALIZATION_PREFERENCES_NAME,
     'monetaryDecimalPoint' => CRM_Core_BAO_Setting::LOCALIZATION_PREFERENCES_NAME,
     'moneyformat' => CRM_Core_BAO_Setting::LOCALIZATION_PREFERENCES_NAME,
@@ -43,11 +44,9 @@ class CRM_Admin_Form_Setting_Localization extends CRM_Admin_Form_Setting {
    * Build the form object.
    */
   public function buildQuickForm() {
-    $config = CRM_Core_Config::singleton();
-
     $this->setTitle(ts('Settings - Localization'));
 
-    $warningTitle = json_encode(ts("Warning"));
+    $warningTitle = json_encode(ts('Warning'));
     $defaultLocaleOptions = CRM_Admin_Form_Setting_Localization::getDefaultLocaleOptions();
 
     if (CRM_Core_I18n::isMultiLingual()) {
diff --git a/CRM/Core/I18n.php b/CRM/Core/I18n.php
index f6ed3dcf0339..30cb0cb8eadc 100644
--- a/CRM/Core/I18n.php
+++ b/CRM/Core/I18n.php
@@ -239,6 +239,28 @@ public static function languages($justEnabled = FALSE) {
     return $justEnabled ? $enabled : $all;
   }
 
+  /**
+   * Get the options available for format locale.
+   *
+   * Note the pseudoconstant can't be used as the key is the name not the value.
+   *
+   * @return array
+   */
+  public static function getFormatLocales(): array {
+    $values = CRM_Core_OptionValue::getValues(['name' => 'languages'], $optionValues, 'label', TRUE);
+    $return = [];
+    $return[NULL] = ts('Inherit from language');
+    foreach ($values as $value) {
+      $return[$value['name']] = $value['label'];
+    }
+    // Sorry not sorry.
+    // Hacking in for now since the is probably the most important use-case for
+    // money formatting in an English speaking non-US locale based on any reasonable
+    // metric.
+    $return['en_NZ'] = ts('English (New Zealand)');
+    return $return;
+  }
+
   /**
    * Return the available UI languages
    * @return array|string
diff --git a/Civi/Core/Format.php b/Civi/Core/Format.php
index 582727cce57a..b3076d0e8dc6 100644
--- a/Civi/Core/Format.php
+++ b/Civi/Core/Format.php
@@ -43,7 +43,7 @@ public function money($amount, ?string $currency = NULL, ?string $locale = NULL)
       $currency = Civi::settings()->get('defaultCurrency');
     }
     if (!isset($locale)) {
-      $locale = CRM_Core_I18n::getLocale();
+      $locale = Civi::settings()->get('format_locale') ?? CRM_Core_I18n::getLocale();
     }
     $money = Money::of($amount, $currency, NULL, RoundingMode::HALF_UP);
     $formatter = $this->getMoneyFormatter($currency, $locale);
@@ -150,7 +150,7 @@ public function moneyNumberLong($amount, ?string $currency, ?string $locale): st
    * we are looking at how to manage an 'opt in'
    */
   protected function isUseSeparatorSettings(): bool {
-    return !CRM_Utils_Constant::value('IGNORE_SEPARATOR_CONFIG');
+    return !Civi::settings()->get('format_locale') && !CRM_Utils_Constant::value('IGNORE_SEPARATOR_CONFIG');
   }
 
   /**
diff --git a/settings/Localization.setting.php b/settings/Localization.setting.php
index ec1be4f3bbfc..6a55c01d981d 100644
--- a/settings/Localization.setting.php
+++ b/settings/Localization.setting.php
@@ -409,6 +409,27 @@
       'callback' => 'CRM_Core_I18n::languages',
     ],
   ],
+  'format_locale' => [
+    'group_name' => 'Localization Preferences',
+    'group' => 'localization',
+    'name' => 'format_locale',
+    'type' => 'String',
+    'quick_form_type' => 'Select',
+    'html_type' => 'Select',
+    'html_attributes' => [
+      'class' => 'crm-select2',
+    ],
+    'default' => NULL,
+    'add' => '5.47',
+    'title' => ts('Formatting locale'),
+    'is_domain' => 1,
+    'is_contact' => 0,
+    'help_text' => NULL,
+    'pseudoconstant' => [
+      'callback' => 'CRM_Core_I18n::getFormatLocales',
+    ],
+    'description' => ts('Locale to use when formatting money (and in future dates). This replaces thousandsSeparator & decimalSeparator & moneyFormat settings.'),
+  ],
   'uiLanguages' => [
     'group_name' => 'Localization Preferences',
     'group' => 'localization',
diff --git a/templates/CRM/Admin/Form/Setting/Localization.tpl b/templates/CRM/Admin/Form/Setting/Localization.tpl
index 754212bc0e12..05fd577a9b32 100644
--- a/templates/CRM/Admin/Form/Setting/Localization.tpl
+++ b/templates/CRM/Admin/Form/Setting/Localization.tpl
@@ -49,10 +49,15 @@
               <span class="description">{$settings_fields.contact_default_language.description}</span>
             </td>
           </tr>
-            <tr class="crm-localization-form-block-defaultCurrency">
-                <td class="label">{$form.defaultCurrency.label} {help id='defaultCurrency' title=$form.defaultCurrency.label}</td>
-                <td>{$form.defaultCurrency.html}</td>
-            </tr>
+          <tr class="crm-localization-form-block-defaultCurrency">
+            <td class="label">{$form.defaultCurrency.label} {help id='defaultCurrency' title=$form.defaultCurrency.label}</td>
+            <td>{$form.defaultCurrency.html}</td>
+          </tr>
+          <tr class="crm-localization-form-block-format_locale">
+            <td class="label">{$form.format_locale.label}</td>
+            <td>{$form.format_locale.html}<br />
+              <span class="description">{ts}Locale to use when formatting money (and in future dates). This replaces thousandsSeparator & decimalSeparator settings.{/ts}</span></td>
+          </tr>
             <tr class="crm-localization-form-block-monetaryThousandSeparator">
                 <td class="label">{$form.monetaryThousandSeparator.label}</td>
                 <td>{$form.monetaryThousandSeparator.html}</td>