diff --git a/.github/workflows/intl-data-tests.yml b/.github/workflows/intl-data-tests.yml
index 193b3dd1df14d..06a215b0857b5 100644
--- a/.github/workflows/intl-data-tests.yml
+++ b/.github/workflows/intl-data-tests.yml
@@ -84,7 +84,11 @@ jobs:
         run: uconv -V && php -i | grep 'ICU version'
 
       - name: Run intl-data tests
-        run: ./phpunit --group intl-data -v
+        run: |
+          ./phpunit --group intl-data --exclude-group intl-data-isolate -v
+          ./phpunit --group intl-data --filter testWhenEnvVarNotSet -v
+          ./phpunit --group intl-data --filter testWhenEnvVarSetFalse -v
+          ./phpunit --group intl-data --filter testWhenEnvVarSetTrue -v
 
       - name: Test intl-data with compressed data
         run: |
diff --git a/src/Symfony/Component/Intl/CHANGELOG.md b/src/Symfony/Component/Intl/CHANGELOG.md
index ed7abd49647ea..33efad1f5b2f5 100644
--- a/src/Symfony/Component/Intl/CHANGELOG.md
+++ b/src/Symfony/Component/Intl/CHANGELOG.md
@@ -1,6 +1,11 @@
 CHANGELOG
 =========
 
+7.4
+---
+
+ * Allow Kosovo as a component region, controlled by the `SYMFONY_INTL_WITH_USER_ASSIGNED` env var
+
 7.1
 ---
 
diff --git a/src/Symfony/Component/Intl/Countries.php b/src/Symfony/Component/Intl/Countries.php
index 256bd54ebcafa..60ef4c52a2871 100644
--- a/src/Symfony/Component/Intl/Countries.php
+++ b/src/Symfony/Component/Intl/Countries.php
@@ -21,6 +21,8 @@
  */
 final class Countries extends ResourceBundle
 {
+    private static bool $withUserAssigned;
+
     /**
      * Returns all available countries.
      *
@@ -35,7 +37,11 @@ final class Countries extends ResourceBundle
      */
     public static function getCountryCodes(): array
     {
-        return self::readEntry(['Regions'], 'meta');
+        if (!self::withUserAssigned()) {
+            return self::readEntry(['Regions'], 'meta');
+        }
+
+        return array_merge(self::readEntry(['Regions'], 'meta'), self::readEntry(['UserAssignedRegions'], 'meta'));
     }
 
     /**
@@ -49,7 +55,11 @@ public static function getCountryCodes(): array
      */
     public static function getAlpha3Codes(): array
     {
-        return self::readEntry(['Alpha2ToAlpha3'], 'meta');
+        if (!self::withUserAssigned()) {
+            return self::readEntry(['Alpha2ToAlpha3'], 'meta');
+        }
+
+        return array_merge(self::readEntry(['Alpha2ToAlpha3'], 'meta'), self::readEntry(['UserAssignedAlpha2ToAlpha3'], 'meta'));
     }
 
     /**
@@ -65,26 +75,58 @@ public static function getAlpha3Codes(): array
      */
     public static function getNumericCodes(): array
     {
-        return self::readEntry(['Alpha2ToNumeric'], 'meta');
+        if (!self::withUserAssigned()) {
+            return self::readEntry(['Alpha2ToNumeric'], 'meta');
+        }
+
+        return array_merge(self::readEntry(['Alpha2ToNumeric'], 'meta'), self::readEntry(['UserAssignedAlpha2ToNumeric'], 'meta'));
     }
 
     public static function getAlpha3Code(string $alpha2Code): string
     {
+        if (self::withUserAssigned()) {
+            try {
+                return self::readEntry(['UserAssignedAlpha2ToAlpha3', $alpha2Code], 'meta');
+            } catch (MissingResourceException) {
+            }
+        }
+
         return self::readEntry(['Alpha2ToAlpha3', $alpha2Code], 'meta');
     }
 
     public static function getAlpha2Code(string $alpha3Code): string
     {
+        if (self::withUserAssigned()) {
+            try {
+                return self::readEntry(['UserAssignedAlpha3ToAlpha2', $alpha3Code], 'meta');
+            } catch (MissingResourceException) {
+            }
+        }
+
         return self::readEntry(['Alpha3ToAlpha2', $alpha3Code], 'meta');
     }
 
     public static function getNumericCode(string $alpha2Code): string
     {
+        if (self::withUserAssigned()) {
+            try {
+                return self::readEntry(['UserAssignedAlpha2ToNumeric', $alpha2Code], 'meta');
+            } catch (MissingResourceException) {
+            }
+        }
+
         return self::readEntry(['Alpha2ToNumeric', $alpha2Code], 'meta');
     }
 
     public static function getAlpha2FromNumeric(string $numericCode): string
     {
+        if (self::withUserAssigned()) {
+            try {
+                return self::readEntry(['UserAssignedNumericToAlpha2', '_'.$numericCode], 'meta');
+            } catch (MissingResourceException) {
+            }
+        }
+
         // Use an underscore prefix to force numeric strings with leading zeros to remain as strings
         return self::readEntry(['NumericToAlpha2', '_'.$numericCode], 'meta');
     }
@@ -92,7 +134,7 @@ public static function getAlpha2FromNumeric(string $numericCode): string
     public static function exists(string $alpha2Code): bool
     {
         try {
-            self::readEntry(['Names', $alpha2Code]);
+            self::getAlpha3Code($alpha2Code);
 
             return true;
         } catch (MissingResourceException) {
@@ -129,6 +171,13 @@ public static function numericCodeExists(string $numericCode): bool
      */
     public static function getName(string $country, ?string $displayLocale = null): string
     {
+        if (self::withUserAssigned()) {
+            try {
+                return self::readEntry(['UserAssignedNames', $country], $displayLocale);
+            } catch (MissingResourceException) {
+            }
+        }
+
         return self::readEntry(['Names', $country], $displayLocale);
     }
 
@@ -149,7 +198,11 @@ public static function getAlpha3Name(string $alpha3Code, ?string $displayLocale
      */
     public static function getNames(?string $displayLocale = null): array
     {
-        return self::asort(self::readEntry(['Names'], $displayLocale), $displayLocale);
+        if (!self::withUserAssigned()) {
+            return self::asort(self::readEntry(['Names'], $displayLocale), $displayLocale);
+        }
+
+        return self::asort(array_merge(self::readEntry(['Names'], $displayLocale), self::readEntry(['UserAssignedNames'], $displayLocale)), $displayLocale);
     }
 
     /**
@@ -170,6 +223,23 @@ public static function getAlpha3Names(?string $displayLocale = null): array
         return $alpha3Names;
     }
 
+    /**
+     * Sets the internal `withUserAssigned` flag, overriding the default `SYMFONY_INTL_WITH_USER_ASSIGNED` env var.
+     *
+     * The ISO 3166/MA has received information that the CE Commission has allocated the alpha-2 user-assigned code "XK"
+     * to represent Kosovo in the interim of being recognized by the UN as a member state.
+     *
+     * Set `$withUserAssigned` to true to have `XK`, `XKK` and `983` available in the other functions of this class.
+     */
+    public static function withUserAssigned(?bool $withUserAssigned = null): bool
+    {
+        if (null === $withUserAssigned) {
+            return self::$withUserAssigned ??= filter_var($_ENV['SYMFONY_INTL_WITH_USER_ASSIGNED'] ?? $_SERVER['SYMFONY_INTL_WITH_USER_ASSIGNED'] ?? getenv('SYMFONY_INTL_WITH_USER_ASSIGNED'), FILTER_VALIDATE_BOOLEAN);
+        }
+
+        return self::$withUserAssigned = $withUserAssigned;
+    }
+
     protected static function getPath(): string
     {
         return Intl::getDataDirectory().'/'.Intl::REGION_DIR;
diff --git a/src/Symfony/Component/Intl/Data/Generator/RegionDataGenerator.php b/src/Symfony/Component/Intl/Data/Generator/RegionDataGenerator.php
index 5d484edacc1b7..db77b015a8266 100644
--- a/src/Symfony/Component/Intl/Data/Generator/RegionDataGenerator.php
+++ b/src/Symfony/Component/Intl/Data/Generator/RegionDataGenerator.php
@@ -56,11 +56,14 @@ class RegionDataGenerator extends AbstractDataGenerator
         'QO' => true, // Outlying Oceania
         'XA' => true, // Pseudo-Accents
         'XB' => true, // Pseudo-Bidi
-        'XK' => true, // Kosovo
         // Misc
         'ZZ' => true, // Unknown Region
     ];
 
+    private const USER_ASSIGNED = [
+        'XK' => true, // Kosovo
+    ];
+
     // @see https://en.wikipedia.org/wiki/ISO_3166-1_numeric#Withdrawn_codes
     private const WITHDRAWN_CODES = [
         128, //	Canton and Enderbury Islands
@@ -97,7 +100,7 @@ class RegionDataGenerator extends AbstractDataGenerator
 
     public static function isValidCountryCode(int|string|null $region): bool
     {
-        if (isset(self::DENYLIST[$region])) {
+        if (isset(self::DENYLIST[$region]) || isset(self::USER_ASSIGNED[$region])) {
             return false;
         }
 
@@ -109,6 +112,11 @@ public static function isValidCountryCode(int|string|null $region): bool
         return true;
     }
 
+    public static function isUserAssignedCountryCode(int|string|null $region): bool
+    {
+        return isset(self::USER_ASSIGNED[$region]);
+    }
+
     protected function scanLocales(LocaleScanner $scanner, string $sourceDir): array
     {
         return $scanner->scanLocales($sourceDir.'/region');
@@ -131,9 +139,7 @@ protected function generateDataForLocale(BundleEntryReaderInterface $reader, str
 
         // isset() on \ResourceBundle returns true even if the value is null
         if (isset($localeBundle['Countries']) && null !== $localeBundle['Countries']) {
-            $data = [
-                'Names' => $this->generateRegionNames($localeBundle),
-            ];
+            $data = $this->generateRegionNames($localeBundle);
 
             $this->regionCodes = array_merge($this->regionCodes, array_keys($data['Names']));
 
@@ -153,23 +159,39 @@ protected function generateDataForMeta(BundleEntryReaderInterface $reader, strin
         $metadataBundle = $reader->read($tempDir, 'metadata');
 
         $this->regionCodes = array_unique($this->regionCodes);
-
         sort($this->regionCodes);
 
         $alpha2ToAlpha3 = $this->generateAlpha2ToAlpha3Mapping(array_flip($this->regionCodes), $metadataBundle);
+        $userAssignedAlpha2ToAlpha3 = $this->generateAlpha2ToAlpha3Mapping(self::USER_ASSIGNED, $metadataBundle);
+
         $alpha3ToAlpha2 = array_flip($alpha2ToAlpha3);
         asort($alpha3ToAlpha2);
+        $userAssignedAlpha3toAlpha2 = array_flip($userAssignedAlpha2ToAlpha3);
+        asort($userAssignedAlpha3toAlpha2);
 
         $alpha2ToNumeric = $this->generateAlpha2ToNumericMapping(array_flip($this->regionCodes), $metadataBundle);
+        $userAssignedAlpha2ToNumeric = $this->generateAlpha2ToNumericMapping(self::USER_ASSIGNED, $metadataBundle);
+
         $numericToAlpha2 = [];
         foreach ($alpha2ToNumeric as $alpha2 => $numeric) {
             // Add underscore prefix to force keys with leading zeros to remain as string keys.
             $numericToAlpha2['_'.$numeric] = $alpha2;
         }
+        $userAssignedNumericToAlpha2 = [];
+        foreach ($userAssignedAlpha2ToNumeric as $alpha2 => $numeric) {
+            // Add underscore prefix to force keys with leading zeros to remain as string keys.
+            $userAssignedNumericToAlpha2['_'.$numeric] = $alpha2;
+        }
 
         asort($numericToAlpha2);
+        asort($userAssignedNumericToAlpha2);
 
         return [
+            'UserAssignedRegions' => array_keys(self::USER_ASSIGNED),
+            'UserAssignedAlpha2ToAlpha3' => $userAssignedAlpha2ToAlpha3,
+            'UserAssignedAlpha3ToAlpha2' => $userAssignedAlpha3toAlpha2,
+            'UserAssignedAlpha2ToNumeric' => $userAssignedAlpha2ToNumeric,
+            'UserAssignedNumericToAlpha2' => $userAssignedNumericToAlpha2,
             'Regions' => $this->regionCodes,
             'Alpha2ToAlpha3' => $alpha2ToAlpha3,
             'Alpha3ToAlpha2' => $alpha3ToAlpha2,
@@ -181,14 +203,19 @@ protected function generateDataForMeta(BundleEntryReaderInterface $reader, strin
     protected function generateRegionNames(ArrayAccessibleResourceBundle $localeBundle): array
     {
         $unfilteredRegionNames = iterator_to_array($localeBundle['Countries']);
-        $regionNames = [];
+        $regionNames = ['UserAssignedNames' => [], 'Names' => []];
 
         foreach ($unfilteredRegionNames as $region => $regionName) {
-            if (!self::isValidCountryCode($region)) {
+            if (!self::isValidCountryCode($region) && !self::isUserAssignedCountryCode($region)) {
                 continue;
             }
 
-            $regionNames[$region] = $regionName;
+            if (self::isUserAssignedCountryCode($region)) {
+                $regionNames['UserAssignedNames'][$region] = $regionName;
+                continue;
+            }
+
+            $regionNames['Names'][$region] = $regionName;
         }
 
         return $regionNames;
@@ -204,7 +231,9 @@ private function generateAlpha2ToAlpha3Mapping(array $countries, ArrayAccessible
             $country = $data['replacement'];
 
             if (2 === \strlen($country) && 3 === \strlen($alias) && 'overlong' === $data['reason']) {
-                if (isset(self::PREFERRED_ALPHA2_TO_ALPHA3_MAPPING[$country])) {
+                if (isset($countries[$country]) && self::isUserAssignedCountryCode($country)) {
+                    $alpha2ToAlpha3[$country] = $alias;
+                } elseif (isset($countries[$country]) && !self::isUserAssignedCountryCode($country) && isset(self::PREFERRED_ALPHA2_TO_ALPHA3_MAPPING[$country])) {
                     // Validate to prevent typos
                     if (!isset($aliases[self::PREFERRED_ALPHA2_TO_ALPHA3_MAPPING[$country]])) {
                         throw new RuntimeException('The statically set three-letter mapping '.self::PREFERRED_ALPHA2_TO_ALPHA3_MAPPING[$country].' for the country code '.$country.' seems to be invalid. Typo?');
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/af.php b/src/Symfony/Component/Intl/Resources/data/regions/af.php
index 05ebcf4d91120..d195d914f21f7 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/af.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/af.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Verenigde Arabiese Emirate',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ak.php b/src/Symfony/Component/Intl/Resources/data/regions/ak.php
index 9ce46478b1880..71201a2281842 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ak.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ak.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andora',
         'AE' => 'United Arab Emirates',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/am.php b/src/Symfony/Component/Intl/Resources/data/regions/am.php
index db8de423a05b3..40079b57320d3 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/am.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/am.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'ኮሶቮ',
+    ],
     'Names' => [
         'AD' => 'አንዶራ',
         'AE' => 'የተባበሩት ዓረብ ኤምሬትስ',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ar.php b/src/Symfony/Component/Intl/Resources/data/regions/ar.php
index 706caca66c9ae..ec77c64a06cbb 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ar.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ar.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'كوسوفو',
+    ],
     'Names' => [
         'AD' => 'أندورا',
         'AE' => 'الإمارات العربية المتحدة',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ar_LY.php b/src/Symfony/Component/Intl/Resources/data/regions/ar_LY.php
index b21f0d53be388..58326b2c24d65 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ar_LY.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ar_LY.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'MS' => 'مونتيسيرات',
         'UY' => 'أوروغواي',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ar_SA.php b/src/Symfony/Component/Intl/Resources/data/regions/ar_SA.php
index 0071bb8a01d6f..acfa300e7b91f 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ar_SA.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ar_SA.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'MO' => 'ماكاو الصينية (منطقة إدارية خاصة)',
         'MS' => 'مونتيسيرات',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/as.php b/src/Symfony/Component/Intl/Resources/data/regions/as.php
index 2c6b335687517..a77af778309b8 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/as.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/as.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'কচ’ভ’',
+    ],
     'Names' => [
         'AD' => 'আন্দোৰা',
         'AE' => 'সংযুক্ত আৰব আমিৰাত',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/az.php b/src/Symfony/Component/Intl/Resources/data/regions/az.php
index 388aab46a6693..a1fc53e683a15 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/az.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/az.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Birləşmiş Ərəb Əmirlikləri',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/az_Cyrl.php b/src/Symfony/Component/Intl/Resources/data/regions/az_Cyrl.php
index 24c9e4dbdf271..9dc48d217cb14 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/az_Cyrl.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/az_Cyrl.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Косово',
+    ],
     'Names' => [
         'AD' => 'Андорра',
         'AE' => 'Бирләшмиш Әрәб Әмирликләри',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/be.php b/src/Symfony/Component/Intl/Resources/data/regions/be.php
index 5147062cc28ce..2b9ea087ad4f6 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/be.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/be.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Косава',
+    ],
     'Names' => [
         'AD' => 'Андора',
         'AE' => 'Аб’яднаныя Арабскія Эміраты',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/bg.php b/src/Symfony/Component/Intl/Resources/data/regions/bg.php
index 7bc2a9a181b33..c9aa2128b808d 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/bg.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/bg.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Косово',
+    ],
     'Names' => [
         'AD' => 'Андора',
         'AE' => 'Обединени арабски емирства',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/bm.php b/src/Symfony/Component/Intl/Resources/data/regions/bm.php
index b1f377f8936b0..62fae537ce13c 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/bm.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/bm.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AD' => 'Andɔr',
         'AE' => 'Arabu mara kafoli',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/bn.php b/src/Symfony/Component/Intl/Resources/data/regions/bn.php
index 97040e15fb621..7729697ca518f 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/bn.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/bn.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'কসোভো',
+    ],
     'Names' => [
         'AD' => 'আন্ডোরা',
         'AE' => 'সংযুক্ত আরব আমিরাত',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/bn_IN.php b/src/Symfony/Component/Intl/Resources/data/regions/bn_IN.php
index 922ef683b80ab..826fc9ea84e57 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/bn_IN.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/bn_IN.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'UM' => 'মার্কিন যুক্তরাষ্ট্রের দূরবর্তী দ্বীপপুঞ্জ',
     ],
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/bo.php b/src/Symfony/Component/Intl/Resources/data/regions/bo.php
index a4a71569930d4..616e17696f2c0 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/bo.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/bo.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'CN' => 'རྒྱ་ནག',
         'DE' => 'འཇར་མན་',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/bo_IN.php b/src/Symfony/Component/Intl/Resources/data/regions/bo_IN.php
index 5443a778583bc..24ac44af7da72 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/bo_IN.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/bo_IN.php
@@ -1,5 +1,6 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [],
 ];
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/br.php b/src/Symfony/Component/Intl/Resources/data/regions/br.php
index d98bddb65b6d7..3fdd6a494a5cc 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/br.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/br.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Emirelezhioù Arab Unanet',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/bs.php b/src/Symfony/Component/Intl/Resources/data/regions/bs.php
index 1d6c51e744d7d..fee7e5544b3a4 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/bs.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/bs.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andora',
         'AE' => 'Ujedinjeni Arapski Emirati',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/bs_Cyrl.php b/src/Symfony/Component/Intl/Resources/data/regions/bs_Cyrl.php
index 54daa3e9efd8d..bd50ab1eadcab 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/bs_Cyrl.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/bs_Cyrl.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Косово',
+    ],
     'Names' => [
         'AD' => 'Андора',
         'AE' => 'Уједињени Арапски Емирати',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ca.php b/src/Symfony/Component/Intl/Resources/data/regions/ca.php
index 79de364a3957e..cb4661553a44a 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ca.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ca.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Emirats Àrabs Units',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ce.php b/src/Symfony/Component/Intl/Resources/data/regions/ce.php
index 6aae22358df52..ad31812808178 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ce.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ce.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Косово',
+    ],
     'Names' => [
         'AD' => 'Андорра',
         'AE' => 'Ӏарбийн Цхьанатоьхна Эмираташ',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/cs.php b/src/Symfony/Component/Intl/Resources/data/regions/cs.php
index 563320362252c..39fc4d8078843 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/cs.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/cs.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Spojené arabské emiráty',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/cv.php b/src/Symfony/Component/Intl/Resources/data/regions/cv.php
index 295948f178158..b8e37d1b9f018 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/cv.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/cv.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Косово',
+    ],
     'Names' => [
         'AD' => 'Андорра',
         'AE' => 'Арапсен Пӗрлешӳллӗ Эмирачӗ',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/cy.php b/src/Symfony/Component/Intl/Resources/data/regions/cy.php
index 352dfca5beaa8..12ec9b3b3f87e 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/cy.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/cy.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Emiradau Arabaidd Unedig',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/da.php b/src/Symfony/Component/Intl/Resources/data/regions/da.php
index dec48fd1931c6..31b22f02f7fc2 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/da.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/da.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'De Forenede Arabiske Emirater',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/de.php b/src/Symfony/Component/Intl/Resources/data/regions/de.php
index 82f26fff61a1e..4836296a645f5 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/de.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/de.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Vereinigte Arabische Emirate',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/de_AT.php b/src/Symfony/Component/Intl/Resources/data/regions/de_AT.php
index 97296b3d378cc..b68ee04a6c41a 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/de_AT.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/de_AT.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'SJ' => 'Svalbard und Jan Mayen',
     ],
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/de_CH.php b/src/Symfony/Component/Intl/Resources/data/regions/de_CH.php
index 1e3fb1543aa3c..09e04cf0c49c9 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/de_CH.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/de_CH.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'BN' => 'Brunei',
         'BW' => 'Botswana',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/dz.php b/src/Symfony/Component/Intl/Resources/data/regions/dz.php
index 0cc303a68b6f4..41f8864783a09 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/dz.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/dz.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AD' => 'ཨཱན་དོ་ར',
         'AE' => 'ཡུ་ནཱའི་ཊེཌ་ ཨ་རབ་ ཨེ་མེ་རེཊས',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ee.php b/src/Symfony/Component/Intl/Resources/data/regions/ee.php
index fa450d8592cd7..00b9ae791e9a5 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ee.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ee.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AD' => 'Andorra nutome',
         'AE' => 'United Arab Emirates nutome',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/el.php b/src/Symfony/Component/Intl/Resources/data/regions/el.php
index b064ed704cf9e..f47739e1af66b 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/el.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/el.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Κοσσυφοπέδιο',
+    ],
     'Names' => [
         'AD' => 'Ανδόρα',
         'AE' => 'Ηνωμένα Αραβικά Εμιράτα',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/en.php b/src/Symfony/Component/Intl/Resources/data/regions/en.php
index 28fc6cf379328..3548258f64b83 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/en.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/en.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'United Arab Emirates',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/en_001.php b/src/Symfony/Component/Intl/Resources/data/regions/en_001.php
index 24c91849f9009..d234d6b04d1fa 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/en_001.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/en_001.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'BL' => 'St Barthélemy',
         'KN' => 'St Kitts & Nevis',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/en_AU.php b/src/Symfony/Component/Intl/Resources/data/regions/en_AU.php
index 2942a1397e5ad..12b2647f876ca 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/en_AU.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/en_AU.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'BL' => 'St. Barthélemy',
         'KN' => 'St. Kitts & Nevis',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/en_CA.php b/src/Symfony/Component/Intl/Resources/data/regions/en_CA.php
index 5cf36ae88e712..2f9972985b102 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/en_CA.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/en_CA.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AG' => 'Antigua and Barbuda',
         'BA' => 'Bosnia and Herzegovina',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/eo.php b/src/Symfony/Component/Intl/Resources/data/regions/eo.php
index 6a6562db0ed7c..6f3a9856044b5 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/eo.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/eo.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AD' => 'Andoro',
         'AE' => 'Unuiĝintaj Arabaj Emirlandoj',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/es.php b/src/Symfony/Component/Intl/Resources/data/regions/es.php
index 680d5cb81747d..0d362d7f8784a 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/es.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/es.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Emiratos Árabes Unidos',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/es_419.php b/src/Symfony/Component/Intl/Resources/data/regions/es_419.php
index 155ece5ca8192..22b48338486d0 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/es_419.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/es_419.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AX' => 'Islas Åland',
         'BA' => 'Bosnia-Herzegovina',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/es_AR.php b/src/Symfony/Component/Intl/Resources/data/regions/es_AR.php
index 363a7bd36991a..5bd60ee2f2b37 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/es_AR.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/es_AR.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'BA' => 'Bosnia y Herzegovina',
         'TL' => 'Timor-Leste',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/es_BO.php b/src/Symfony/Component/Intl/Resources/data/regions/es_BO.php
index 363a7bd36991a..5bd60ee2f2b37 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/es_BO.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/es_BO.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'BA' => 'Bosnia y Herzegovina',
         'TL' => 'Timor-Leste',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/es_CL.php b/src/Symfony/Component/Intl/Resources/data/regions/es_CL.php
index b126dafd4cf35..675f7e7fa77bf 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/es_CL.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/es_CL.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'BA' => 'Bosnia y Herzegovina',
         'EH' => 'Sahara Occidental',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/es_CO.php b/src/Symfony/Component/Intl/Resources/data/regions/es_CO.php
index 363a7bd36991a..5bd60ee2f2b37 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/es_CO.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/es_CO.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'BA' => 'Bosnia y Herzegovina',
         'TL' => 'Timor-Leste',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/es_CR.php b/src/Symfony/Component/Intl/Resources/data/regions/es_CR.php
index 363a7bd36991a..5bd60ee2f2b37 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/es_CR.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/es_CR.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'BA' => 'Bosnia y Herzegovina',
         'TL' => 'Timor-Leste',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/es_DO.php b/src/Symfony/Component/Intl/Resources/data/regions/es_DO.php
index 363a7bd36991a..5bd60ee2f2b37 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/es_DO.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/es_DO.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'BA' => 'Bosnia y Herzegovina',
         'TL' => 'Timor-Leste',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/es_EC.php b/src/Symfony/Component/Intl/Resources/data/regions/es_EC.php
index 363a7bd36991a..5bd60ee2f2b37 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/es_EC.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/es_EC.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'BA' => 'Bosnia y Herzegovina',
         'TL' => 'Timor-Leste',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/es_GT.php b/src/Symfony/Component/Intl/Resources/data/regions/es_GT.php
index 363a7bd36991a..5bd60ee2f2b37 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/es_GT.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/es_GT.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'BA' => 'Bosnia y Herzegovina',
         'TL' => 'Timor-Leste',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/es_HN.php b/src/Symfony/Component/Intl/Resources/data/regions/es_HN.php
index 363a7bd36991a..5bd60ee2f2b37 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/es_HN.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/es_HN.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'BA' => 'Bosnia y Herzegovina',
         'TL' => 'Timor-Leste',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/es_MX.php b/src/Symfony/Component/Intl/Resources/data/regions/es_MX.php
index 32f410e58fd46..e778df97810ff 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/es_MX.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/es_MX.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'BA' => 'Bosnia y Herzegovina',
         'CI' => 'Côte d’Ivoire',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/es_NI.php b/src/Symfony/Component/Intl/Resources/data/regions/es_NI.php
index 363a7bd36991a..5bd60ee2f2b37 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/es_NI.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/es_NI.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'BA' => 'Bosnia y Herzegovina',
         'TL' => 'Timor-Leste',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/es_PA.php b/src/Symfony/Component/Intl/Resources/data/regions/es_PA.php
index 363a7bd36991a..5bd60ee2f2b37 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/es_PA.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/es_PA.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'BA' => 'Bosnia y Herzegovina',
         'TL' => 'Timor-Leste',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/es_PE.php b/src/Symfony/Component/Intl/Resources/data/regions/es_PE.php
index 363a7bd36991a..5bd60ee2f2b37 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/es_PE.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/es_PE.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'BA' => 'Bosnia y Herzegovina',
         'TL' => 'Timor-Leste',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/es_PR.php b/src/Symfony/Component/Intl/Resources/data/regions/es_PR.php
index 12aa138c1d6a5..331bf937a1de2 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/es_PR.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/es_PR.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'UM' => 'Islas menores alejadas de EE. UU.',
     ],
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/es_PY.php b/src/Symfony/Component/Intl/Resources/data/regions/es_PY.php
index 363a7bd36991a..5bd60ee2f2b37 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/es_PY.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/es_PY.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'BA' => 'Bosnia y Herzegovina',
         'TL' => 'Timor-Leste',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/es_SV.php b/src/Symfony/Component/Intl/Resources/data/regions/es_SV.php
index 12aa138c1d6a5..331bf937a1de2 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/es_SV.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/es_SV.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'UM' => 'Islas menores alejadas de EE. UU.',
     ],
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/es_US.php b/src/Symfony/Component/Intl/Resources/data/regions/es_US.php
index a74fb253a37a6..e242feb13014b 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/es_US.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/es_US.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'BA' => 'Bosnia y Herzegovina',
         'EH' => 'Sahara Occidental',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/es_VE.php b/src/Symfony/Component/Intl/Resources/data/regions/es_VE.php
index 363a7bd36991a..5bd60ee2f2b37 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/es_VE.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/es_VE.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'BA' => 'Bosnia y Herzegovina',
         'TL' => 'Timor-Leste',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/et.php b/src/Symfony/Component/Intl/Resources/data/regions/et.php
index f99f9da49c28c..a40ae562510bd 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/et.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/et.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Araabia Ühendemiraadid',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/eu.php b/src/Symfony/Component/Intl/Resources/data/regions/eu.php
index ba75c7345c2a3..9977b299e42f9 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/eu.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/eu.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Arabiar Emirerri Batuak',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/fa.php b/src/Symfony/Component/Intl/Resources/data/regions/fa.php
index ec875372e04dc..36ac80a62176a 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/fa.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/fa.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'کوزوو',
+    ],
     'Names' => [
         'AD' => 'آندورا',
         'AE' => 'امارات متحدهٔ عربی',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/fa_AF.php b/src/Symfony/Component/Intl/Resources/data/regions/fa_AF.php
index aaac69833c78c..a8b8e916ddf05 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/fa_AF.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/fa_AF.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'کوسوا',
+    ],
     'Names' => [
         'AD' => 'اندورا',
         'AG' => 'انتیگوا و باربودا',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ff.php b/src/Symfony/Component/Intl/Resources/data/regions/ff.php
index 809009018fba6..72dc9f6e9c934 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ff.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ff.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AD' => 'Anndoora',
         'AE' => 'Emiraat Araab Denntuɗe',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ff_Adlm.php b/src/Symfony/Component/Intl/Resources/data/regions/ff_Adlm.php
index 2b928e39eac30..a3576d76088b7 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ff_Adlm.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ff_Adlm.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => '𞤑𞤮𞥅𞤧𞤮𞤾𞤮𞥅',
+    ],
     'Names' => [
         'AD' => '𞤀𞤲𞤣𞤮𞤪𞤢𞥄',
         'AE' => '𞤁𞤫𞤲𞤼𞤢𞤤 𞤋𞤥𞤪𞤢𞥄𞤼𞤭 𞤀𞥄𞤪𞤢𞤦𞤵',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/fi.php b/src/Symfony/Component/Intl/Resources/data/regions/fi.php
index de7e537e3df44..5fe3d5ff71d42 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/fi.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/fi.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Arabiemiirikunnat',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/fo.php b/src/Symfony/Component/Intl/Resources/data/regions/fo.php
index c7c64de87a2cc..b6b40c8eef77e 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/fo.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/fo.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Sameindu Emirríkini',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/fr.php b/src/Symfony/Component/Intl/Resources/data/regions/fr.php
index 70b677a35e555..9d4868b0dcf00 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/fr.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/fr.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorre',
         'AE' => 'Émirats arabes unis',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/fr_BE.php b/src/Symfony/Component/Intl/Resources/data/regions/fr_BE.php
index 0ff5ed2722a98..13d70150fed33 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/fr_BE.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/fr_BE.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'GS' => 'Îles Géorgie du Sud et Sandwich du Sud',
     ],
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/fr_CA.php b/src/Symfony/Component/Intl/Resources/data/regions/fr_CA.php
index 44e4ad44a8282..67e0a140fd1c9 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/fr_CA.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/fr_CA.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AX' => 'îles d’Åland',
         'BN' => 'Brunéi',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/fy.php b/src/Symfony/Component/Intl/Resources/data/regions/fy.php
index 835872624a0c7..a2880af39ee6a 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/fy.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/fy.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Verenigde Arabyske Emiraten',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ga.php b/src/Symfony/Component/Intl/Resources/data/regions/ga.php
index 6f103f46a40de..02411e18a4f21 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ga.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ga.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'an Chosaiv',
+    ],
     'Names' => [
         'AD' => 'Andóra',
         'AE' => 'Aontas na nÉimíríochtaí Arabacha',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/gd.php b/src/Symfony/Component/Intl/Resources/data/regions/gd.php
index a600e21d66459..49d409fbd85cc 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/gd.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/gd.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'A’ Chosobho',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Na h-Iomaratan Arabach Aonaichte',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/gl.php b/src/Symfony/Component/Intl/Resources/data/regions/gl.php
index 78ef728752d58..5aa41c9cf3ebc 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/gl.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/gl.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Emiratos Árabes Unidos',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/gu.php b/src/Symfony/Component/Intl/Resources/data/regions/gu.php
index 3e9a85b6f79ea..7f51f45fac1f2 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/gu.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/gu.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'કોસોવો',
+    ],
     'Names' => [
         'AD' => 'ઍંડોરા',
         'AE' => 'યુનાઇટેડ આરબ અમીરાત',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/gv.php b/src/Symfony/Component/Intl/Resources/data/regions/gv.php
index c9b910c7f1eb5..4ea7071a3f1a2 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/gv.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/gv.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'GB' => 'Rywvaneth Unys',
         'IM' => 'Ellan Vannin',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ha.php b/src/Symfony/Component/Intl/Resources/data/regions/ha.php
index 6acb6d2d61aac..5eeb5f7202afc 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ha.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ha.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kasar Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andora',
         'AE' => 'Haɗaɗɗiyar Daular Larabawa',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/he.php b/src/Symfony/Component/Intl/Resources/data/regions/he.php
index 97871fa1b9769..0fa485c584b7a 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/he.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/he.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'קוסובו',
+    ],
     'Names' => [
         'AD' => 'אנדורה',
         'AE' => 'איחוד האמירויות הערביות',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/hi.php b/src/Symfony/Component/Intl/Resources/data/regions/hi.php
index 2ba9860aca614..380594b4a0c87 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/hi.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/hi.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'कोसोवो',
+    ],
     'Names' => [
         'AD' => 'एंडोरा',
         'AE' => 'संयुक्त अरब अमीरात',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/hi_Latn.php b/src/Symfony/Component/Intl/Resources/data/regions/hi_Latn.php
index 872e047c169ed..944981b8fac87 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/hi_Latn.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/hi_Latn.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AX' => 'Aland Islands',
         'BL' => 'St. Barthelemy',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/hr.php b/src/Symfony/Component/Intl/Resources/data/regions/hr.php
index 5695115a2a426..c7a95eb534ccf 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/hr.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/hr.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andora',
         'AE' => 'Ujedinjeni Arapski Emirati',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/hu.php b/src/Symfony/Component/Intl/Resources/data/regions/hu.php
index 4a0476e038f05..5794025eded3c 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/hu.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/hu.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Koszovó',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Egyesült Arab Emírségek',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/hy.php b/src/Symfony/Component/Intl/Resources/data/regions/hy.php
index 0112f1e91c95b..69320481beffb 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/hy.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/hy.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Կոսովո',
+    ],
     'Names' => [
         'AD' => 'Անդորրա',
         'AE' => 'Արաբական Միացյալ Էմիրություններ',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ia.php b/src/Symfony/Component/Intl/Resources/data/regions/ia.php
index c774c412b2040..793b6353d02c8 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ia.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ia.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Emiratos Arabe Unite',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/id.php b/src/Symfony/Component/Intl/Resources/data/regions/id.php
index 15301561bdb84..6696fb102a07f 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/id.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/id.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Uni Emirat Arab',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ie.php b/src/Symfony/Component/Intl/Resources/data/regions/ie.php
index 96ef834ee4dde..c7bb809cff9c2 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ie.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ie.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AL' => 'Albania',
         'AQ' => 'Antarctica',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ig.php b/src/Symfony/Component/Intl/Resources/data/regions/ig.php
index 5ab42d850cc44..272fcb65347f8 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ig.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ig.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'United Arab Emirates',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ii.php b/src/Symfony/Component/Intl/Resources/data/regions/ii.php
index 283f3bac578f3..9e0de39dfdcf6 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ii.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ii.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'BE' => 'ꀘꆹꏃ',
         'BR' => 'ꀠꑭ',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/in.php b/src/Symfony/Component/Intl/Resources/data/regions/in.php
index 15301561bdb84..6696fb102a07f 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/in.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/in.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Uni Emirat Arab',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/is.php b/src/Symfony/Component/Intl/Resources/data/regions/is.php
index ed721e8af3732..d2fcd67bfc5eb 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/is.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/is.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kósóvó',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Sameinuðu arabísku furstadæmin',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/it.php b/src/Symfony/Component/Intl/Resources/data/regions/it.php
index 60d24f251fbd7..a497ffb64c6d2 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/it.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/it.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Emirati Arabi Uniti',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/iw.php b/src/Symfony/Component/Intl/Resources/data/regions/iw.php
index 97871fa1b9769..0fa485c584b7a 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/iw.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/iw.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'קוסובו',
+    ],
     'Names' => [
         'AD' => 'אנדורה',
         'AE' => 'איחוד האמירויות הערביות',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ja.php b/src/Symfony/Component/Intl/Resources/data/regions/ja.php
index c4d2d3e28d09d..525fa4032a0ac 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ja.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ja.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'コソボ',
+    ],
     'Names' => [
         'AD' => 'アンドラ',
         'AE' => 'アラブ首長国連邦',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/jv.php b/src/Symfony/Component/Intl/Resources/data/regions/jv.php
index 8d4f448607198..d0e4ec98e56d7 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/jv.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/jv.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andora',
         'AE' => 'Uni Émirat Arab',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ka.php b/src/Symfony/Component/Intl/Resources/data/regions/ka.php
index f14737230b131..5253cdba93f26 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ka.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ka.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'კოსოვო',
+    ],
     'Names' => [
         'AD' => 'ანდორა',
         'AE' => 'არაბთა გაერთიანებული საამიროები',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ki.php b/src/Symfony/Component/Intl/Resources/data/regions/ki.php
index 9aebee13ab666..1a1f65351bcce 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ki.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ki.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AD' => 'Andora',
         'AE' => 'Falme za Kiarabu',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/kk.php b/src/Symfony/Component/Intl/Resources/data/regions/kk.php
index 13d48fc7fc1b1..074bfbb659cb7 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/kk.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/kk.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Косово',
+    ],
     'Names' => [
         'AD' => 'Андорра',
         'AE' => 'Біріккен Араб Әмірліктері',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/kl.php b/src/Symfony/Component/Intl/Resources/data/regions/kl.php
index 6bf6cffa2f5f2..3343e653997e2 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/kl.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/kl.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'GL' => 'Kalaallit Nunaat',
     ],
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/km.php b/src/Symfony/Component/Intl/Resources/data/regions/km.php
index aa4f6e46f7329..4c6cb86d97234 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/km.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/km.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'កូសូវ៉ូ',
+    ],
     'Names' => [
         'AD' => 'អង់ដូរ៉ា',
         'AE' => 'អេមីរ៉ាត​អារ៉ាប់​រួម',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/kn.php b/src/Symfony/Component/Intl/Resources/data/regions/kn.php
index dc9e98f085428..4ffe610eab038 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/kn.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/kn.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'ಕೊಸೊವೊ',
+    ],
     'Names' => [
         'AD' => 'ಅಂಡೋರಾ',
         'AE' => 'ಯುನೈಟೆಡ್ ಅರಬ್ ಎಮಿರೇಟ್ಸ್',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ko.php b/src/Symfony/Component/Intl/Resources/data/regions/ko.php
index 2a1d87aa8f077..56083b408c570 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ko.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ko.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => '코소보',
+    ],
     'Names' => [
         'AD' => '안도라',
         'AE' => '아랍에미리트',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ko_KP.php b/src/Symfony/Component/Intl/Resources/data/regions/ko_KP.php
index 0870325a33642..1f025606d35a2 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ko_KP.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ko_KP.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'KP' => '조선민주주의인민공화국',
     ],
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ks.php b/src/Symfony/Component/Intl/Resources/data/regions/ks.php
index a14d8f0744809..f88df32079a21 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ks.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ks.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'کوسوو',
+    ],
     'Names' => [
         'AD' => 'اینڈورا',
         'AE' => 'مُتحدہ عرَب امارات',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ks_Deva.php b/src/Symfony/Component/Intl/Resources/data/regions/ks_Deva.php
index 663fe2bf4d17e..04c545219fa7f 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ks_Deva.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ks_Deva.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'BR' => 'ब्राज़ील',
         'CN' => 'चीन',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ku.php b/src/Symfony/Component/Intl/Resources/data/regions/ku.php
index b1acced429840..49e06a885fed7 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ku.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ku.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosova',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Mîrgehên Erebî yên Yekbûyî',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/kw.php b/src/Symfony/Component/Intl/Resources/data/regions/kw.php
index c058f8a885dd8..6e6f988388381 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/kw.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/kw.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'GB' => 'Rywvaneth Unys',
     ],
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ky.php b/src/Symfony/Component/Intl/Resources/data/regions/ky.php
index 088c0ea1ad6ca..9569eea3b79ad 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ky.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ky.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Косово',
+    ],
     'Names' => [
         'AD' => 'Андорра',
         'AE' => 'Бириккен Араб Эмираттары',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/lb.php b/src/Symfony/Component/Intl/Resources/data/regions/lb.php
index 9fd2737958388..4d8ce111e5212 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/lb.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/lb.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Vereenegt Arabesch Emirater',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/lg.php b/src/Symfony/Component/Intl/Resources/data/regions/lg.php
index d49f2211766ca..65b82eeb4e191 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/lg.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/lg.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AD' => 'Andora',
         'AE' => 'Emireeti',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ln.php b/src/Symfony/Component/Intl/Resources/data/regions/ln.php
index 27ec4ffaa16bd..3fbc81b5925cf 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ln.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ln.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AD' => 'Andorɛ',
         'AE' => 'Lɛmila alabo',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/lo.php b/src/Symfony/Component/Intl/Resources/data/regions/lo.php
index 05e8016116ea2..53399c7a939cb 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/lo.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/lo.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'ໂຄໂຊໂວ',
+    ],
     'Names' => [
         'AD' => 'ອັນດໍຣາ',
         'AE' => 'ສະຫະລັດອາຣັບເອມິເຣດ',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/lt.php b/src/Symfony/Component/Intl/Resources/data/regions/lt.php
index 3448a1b9de1fc..f8c6f5c880fe2 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/lt.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/lt.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovas',
+    ],
     'Names' => [
         'AD' => 'Andora',
         'AE' => 'Jungtiniai Arabų Emyratai',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/lu.php b/src/Symfony/Component/Intl/Resources/data/regions/lu.php
index 47340456e5ba9..415f6b60f853c 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/lu.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/lu.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AD' => 'Andore',
         'AE' => 'Lemila alabu',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/lv.php b/src/Symfony/Component/Intl/Resources/data/regions/lv.php
index d5243f2c9997b..84f1ded9e37ff 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/lv.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/lv.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosova',
+    ],
     'Names' => [
         'AD' => 'Andora',
         'AE' => 'Apvienotie Arābu Emirāti',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/meta.php b/src/Symfony/Component/Intl/Resources/data/regions/meta.php
index e0a99ccb7f5a8..edb6b01a09f8a 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/meta.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/meta.php
@@ -1,6 +1,21 @@
 <?php
 
 return [
+    'UserAssignedRegions' => [
+        'XK',
+    ],
+    'UserAssignedAlpha2ToAlpha3' => [
+        'XK' => 'XKK',
+    ],
+    'UserAssignedAlpha3ToAlpha2' => [
+        'XKK' => 'XK',
+    ],
+    'UserAssignedAlpha2ToNumeric' => [
+        'XK' => '983',
+    ],
+    'UserAssignedNumericToAlpha2' => [
+        '_983' => 'XK',
+    ],
     'Regions' => [
         'AD',
         'AE',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/mg.php b/src/Symfony/Component/Intl/Resources/data/regions/mg.php
index a48976a62835d..1100acdb2c6de 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/mg.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/mg.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Emirà Arabo mitambatra',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/mi.php b/src/Symfony/Component/Intl/Resources/data/regions/mi.php
index 50b5e42239bb1..d2bc2234abb90 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/mi.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/mi.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kōhoro',
+    ],
     'Names' => [
         'AD' => 'Anatōra',
         'AE' => 'Kotahitanga o ngā Whenua o Ārapi',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/mk.php b/src/Symfony/Component/Intl/Resources/data/regions/mk.php
index bd84d27b52053..58547a4a8a50c 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/mk.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/mk.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Косово',
+    ],
     'Names' => [
         'AD' => 'Андора',
         'AE' => 'Обединети Арапски Емирати',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ml.php b/src/Symfony/Component/Intl/Resources/data/regions/ml.php
index eee668aa0f60d..30d9fdb426313 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ml.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ml.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'കൊസോവൊ',
+    ],
     'Names' => [
         'AD' => 'അൻഡോറ',
         'AE' => 'യുണൈറ്റഡ് അറബ് എമിറൈറ്റ്‌സ്',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/mn.php b/src/Symfony/Component/Intl/Resources/data/regions/mn.php
index 9eac0c43d92e0..51951db699aea 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/mn.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/mn.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Косово',
+    ],
     'Names' => [
         'AD' => 'Андорра',
         'AE' => 'Арабын Нэгдсэн Эмират Улс',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/mo.php b/src/Symfony/Component/Intl/Resources/data/regions/mo.php
index 0ed1719834a55..cf6a4a95eb289 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/mo.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/mo.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Emiratele Arabe Unite',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/mr.php b/src/Symfony/Component/Intl/Resources/data/regions/mr.php
index 66bc027facdb8..c8ae5e8876a71 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/mr.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/mr.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'कोसोव्हो',
+    ],
     'Names' => [
         'AD' => 'अँडोरा',
         'AE' => 'संयुक्त अरब अमीरात',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ms.php b/src/Symfony/Component/Intl/Resources/data/regions/ms.php
index bd3711a1a15d4..45f6bf19b6a58 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ms.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ms.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Emiriah Arab Bersatu',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/mt.php b/src/Symfony/Component/Intl/Resources/data/regions/mt.php
index 215fb165ac147..0e09df5e6f0ec 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/mt.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/mt.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'il-Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'l-Emirati Għarab Magħquda',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/my.php b/src/Symfony/Component/Intl/Resources/data/regions/my.php
index 7df0ad71ee6a2..2bf3ce8fc34ce 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/my.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/my.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'ကိုဆိုဗို',
+    ],
     'Names' => [
         'AD' => 'အန်ဒိုရာ',
         'AE' => 'ယူအေအီး',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/nd.php b/src/Symfony/Component/Intl/Resources/data/regions/nd.php
index 0d19b4b99a22d..f2e9ab6a178dd 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/nd.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/nd.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AD' => 'Andora',
         'AE' => 'United Arab Emirates',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ne.php b/src/Symfony/Component/Intl/Resources/data/regions/ne.php
index df57f91a43170..e57b1642cfe34 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ne.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ne.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'कोसोभो',
+    ],
     'Names' => [
         'AD' => 'अन्डोर्रा',
         'AE' => 'संयुक्त अरब इमिराट्स',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/nl.php b/src/Symfony/Component/Intl/Resources/data/regions/nl.php
index 8de351dd58325..c6500d916735c 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/nl.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/nl.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Verenigde Arabische Emiraten',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/nn.php b/src/Symfony/Component/Intl/Resources/data/regions/nn.php
index 5a068bab17530..8555559a110b6 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/nn.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/nn.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AE' => 'Dei sameinte arabiske emirata',
         'AT' => 'Austerrike',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/no.php b/src/Symfony/Component/Intl/Resources/data/regions/no.php
index b9faba96a13ef..90c78d41673c9 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/no.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/no.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'De forente arabiske emirater',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/no_NO.php b/src/Symfony/Component/Intl/Resources/data/regions/no_NO.php
index b9faba96a13ef..90c78d41673c9 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/no_NO.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/no_NO.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'De forente arabiske emirater',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/oc.php b/src/Symfony/Component/Intl/Resources/data/regions/oc.php
index 8120544065996..d79dd92093ab4 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/oc.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/oc.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'ES' => 'Espanha',
         'FR' => 'França',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/om.php b/src/Symfony/Component/Intl/Resources/data/regions/om.php
index c2b577b2c9f49..5cc0ddac39755 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/om.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/om.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosoovoo',
+    ],
     'Names' => [
         'AD' => 'Andooraa',
         'AE' => 'Yuunaatid Arab Emereet',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/or.php b/src/Symfony/Component/Intl/Resources/data/regions/or.php
index 75e394669d56b..6fefa8e50509e 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/or.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/or.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'କୋସୋଭୋ',
+    ],
     'Names' => [
         'AD' => 'ଆଣ୍ଡୋରା',
         'AE' => 'ସଂଯୁକ୍ତ ଆରବ ଏମିରେଟସ୍',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/os.php b/src/Symfony/Component/Intl/Resources/data/regions/os.php
index 20c6e4cb8a580..948177b59ffa9 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/os.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/os.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'BR' => 'Бразили',
         'CN' => 'Китай',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/pa.php b/src/Symfony/Component/Intl/Resources/data/regions/pa.php
index 04500df8a8106..3e0d3aba9fd31 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/pa.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/pa.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'ਕੋਸੋਵੋ',
+    ],
     'Names' => [
         'AD' => 'ਅੰਡੋਰਾ',
         'AE' => 'ਸੰਯੁਕਤ ਅਰਬ ਅਮੀਰਾਤ',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/pa_Arab.php b/src/Symfony/Component/Intl/Resources/data/regions/pa_Arab.php
index c3cb71aadf9df..d354dfe72e474 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/pa_Arab.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/pa_Arab.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'PK' => 'پاکستان',
     ],
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/pl.php b/src/Symfony/Component/Intl/Resources/data/regions/pl.php
index d3b2d2c0de3ed..d2d1b9c547eeb 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/pl.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/pl.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosowo',
+    ],
     'Names' => [
         'AD' => 'Andora',
         'AE' => 'Zjednoczone Emiraty Arabskie',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ps.php b/src/Symfony/Component/Intl/Resources/data/regions/ps.php
index 708d1727b94a1..7667e8472eec3 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ps.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ps.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'کوسوو',
+    ],
     'Names' => [
         'AD' => 'اندورا',
         'AE' => 'متحده عرب امارات',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ps_PK.php b/src/Symfony/Component/Intl/Resources/data/regions/ps_PK.php
index 8f4529424b7db..336a0bbcbf1db 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ps_PK.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ps_PK.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'PS' => 'فلسطين سيمے',
         'TC' => 'د ترکیے او کیکاسو ټاپو',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/pt.php b/src/Symfony/Component/Intl/Resources/data/regions/pt.php
index c2d4a850fa0d7..60d2aed4d7d50 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/pt.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/pt.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Emirados Árabes Unidos',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/pt_PT.php b/src/Symfony/Component/Intl/Resources/data/regions/pt_PT.php
index 3db7edc5568df..98fe3a81e26d6 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/pt_PT.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/pt_PT.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AM' => 'Arménia',
         'AX' => 'Alanda',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/qu.php b/src/Symfony/Component/Intl/Resources/data/regions/qu.php
index 9cc5f3ef3a7d4..0b53c38d10986 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/qu.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/qu.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Emiratos Árabes Unidos',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/rm.php b/src/Symfony/Component/Intl/Resources/data/regions/rm.php
index 96837181483ca..e1040040d0ccd 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/rm.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/rm.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Cosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Emirats Arabs Unids',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/rn.php b/src/Symfony/Component/Intl/Resources/data/regions/rn.php
index a99647cd90704..b9a82b01dcbbe 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/rn.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/rn.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AD' => 'Andora',
         'AE' => 'Leta Zunze Ubumwe z’Abarabu',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ro.php b/src/Symfony/Component/Intl/Resources/data/regions/ro.php
index 0ed1719834a55..cf6a4a95eb289 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ro.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ro.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Emiratele Arabe Unite',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ro_MD.php b/src/Symfony/Component/Intl/Resources/data/regions/ro_MD.php
index eb8765a71dadb..7bd3d5f2f6b84 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ro_MD.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ro_MD.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'MM' => 'Myanmar',
     ],
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ru.php b/src/Symfony/Component/Intl/Resources/data/regions/ru.php
index 75aa265482cbd..5de85bb4ae720 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ru.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ru.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Косово',
+    ],
     'Names' => [
         'AD' => 'Андорра',
         'AE' => 'ОАЭ',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ru_UA.php b/src/Symfony/Component/Intl/Resources/data/regions/ru_UA.php
index e78d9402d3966..dc17752f4c74e 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ru_UA.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ru_UA.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AE' => 'Объединенные Арабские Эмираты',
         'BV' => 'О-в Буве',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/rw.php b/src/Symfony/Component/Intl/Resources/data/regions/rw.php
index abc13ce86dbe1..6751992bf8247 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/rw.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/rw.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'MK' => 'Masedoniya y’Amajyaruguru',
         'RW' => 'U Rwanda',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/sa.php b/src/Symfony/Component/Intl/Resources/data/regions/sa.php
index 9e8131e152352..e24719b78dfb1 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/sa.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/sa.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'BR' => 'ब्राजील',
         'CN' => 'चीन:',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/sc.php b/src/Symfony/Component/Intl/Resources/data/regions/sc.php
index bc91e96bde430..e051566380bce 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/sc.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/sc.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kòssovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Emirados Àrabos Unidos',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/sd.php b/src/Symfony/Component/Intl/Resources/data/regions/sd.php
index f0ef3e9e3b5ff..001a24fe698ab 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/sd.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/sd.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'ڪوسووو',
+    ],
     'Names' => [
         'AD' => 'اندورا',
         'AE' => 'متحده عرب امارات',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/sd_Deva.php b/src/Symfony/Component/Intl/Resources/data/regions/sd_Deva.php
index e0745ed23f274..ff27f7eb3bf80 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/sd_Deva.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/sd_Deva.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'BR' => 'ब्राज़ील',
         'CN' => 'चीन',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/se.php b/src/Symfony/Component/Intl/Resources/data/regions/se.php
index c750176ee3810..cb50aa47e0d18 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/se.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/se.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Ovttastuvvan Arábaemiráhtat',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/se_FI.php b/src/Symfony/Component/Intl/Resources/data/regions/se_FI.php
index 16e121558e7d4..a4a2b47e44e08 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/se_FI.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/se_FI.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'BA' => 'Bosnia ja Hercegovina',
         'KH' => 'Kamboža',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/sg.php b/src/Symfony/Component/Intl/Resources/data/regions/sg.php
index 45f10b885840e..e0972f5b123cd 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/sg.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/sg.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AD' => 'Andôro',
         'AE' => 'Arâbo Emirâti Ôko',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/sh.php b/src/Symfony/Component/Intl/Resources/data/regions/sh.php
index b9c96a6712a3e..d45c32d5f2f4d 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/sh.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/sh.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andora',
         'AE' => 'Ujedinjeni Arapski Emirati',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/sh_BA.php b/src/Symfony/Component/Intl/Resources/data/regions/sh_BA.php
index 59fb9ddeb794b..9babaf4088967 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/sh_BA.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/sh_BA.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AX' => 'Olandska ostrva',
         'BL' => 'Sen Bartelemi',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/si.php b/src/Symfony/Component/Intl/Resources/data/regions/si.php
index 7b1ba02ba9dca..e27a3dca47e61 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/si.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/si.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'කොසෝවෝ',
+    ],
     'Names' => [
         'AD' => 'ඇන්ඩෝරාව',
         'AE' => 'එක්සත් අරාබි එමිර් රාජ්‍යය',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/sk.php b/src/Symfony/Component/Intl/Resources/data/regions/sk.php
index f1d06ed62253c..cd2a1af54cd65 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/sk.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/sk.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Spojené arabské emiráty',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/sl.php b/src/Symfony/Component/Intl/Resources/data/regions/sl.php
index df9000856990e..6611ff12e121c 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/sl.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/sl.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andora',
         'AE' => 'Združeni arabski emirati',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/sn.php b/src/Symfony/Component/Intl/Resources/data/regions/sn.php
index b983c57364389..3cdd7065e6a11 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/sn.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/sn.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AD' => 'Andora',
         'AE' => 'United Arab Emirates',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/so.php b/src/Symfony/Component/Intl/Resources/data/regions/so.php
index d1c87d5944f7b..db738f29e49ee 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/so.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/so.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Koosofo',
+    ],
     'Names' => [
         'AD' => 'Andora',
         'AE' => 'Midawga Imaaraatka Carabta',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/sq.php b/src/Symfony/Component/Intl/Resources/data/regions/sq.php
index 4fdd3301d288f..0b75f9737c7b5 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/sq.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/sq.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovë',
+    ],
     'Names' => [
         'AD' => 'Andorrë',
         'AE' => 'Emiratet e Bashkuara Arabe',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/sr.php b/src/Symfony/Component/Intl/Resources/data/regions/sr.php
index 1fbb7b74e50ee..74a2c49e744ce 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/sr.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/sr.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Косово',
+    ],
     'Names' => [
         'AD' => 'Андора',
         'AE' => 'Уједињени Арапски Емирати',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/sr_BA.php b/src/Symfony/Component/Intl/Resources/data/regions/sr_BA.php
index ba8ae9bdeb78a..63d26a311ae4a 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/sr_BA.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/sr_BA.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AX' => 'Оландска острва',
         'BL' => 'Сен Бартелеми',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/sr_Cyrl_BA.php b/src/Symfony/Component/Intl/Resources/data/regions/sr_Cyrl_BA.php
index ba8ae9bdeb78a..63d26a311ae4a 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/sr_Cyrl_BA.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/sr_Cyrl_BA.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AX' => 'Оландска острва',
         'BL' => 'Сен Бартелеми',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/sr_Cyrl_ME.php b/src/Symfony/Component/Intl/Resources/data/regions/sr_Cyrl_ME.php
index 5279920836b72..589ecc40af1f7 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/sr_Cyrl_ME.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/sr_Cyrl_ME.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'BY' => 'Бјелорусија',
         'CG' => 'Конго',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/sr_Cyrl_XK.php b/src/Symfony/Component/Intl/Resources/data/regions/sr_Cyrl_XK.php
index 2e42f487d0717..4e4947f37e468 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/sr_Cyrl_XK.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/sr_Cyrl_XK.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'CG' => 'Конго',
         'CV' => 'Кабо Верде',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/sr_Latn.php b/src/Symfony/Component/Intl/Resources/data/regions/sr_Latn.php
index b9c96a6712a3e..d45c32d5f2f4d 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/sr_Latn.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/sr_Latn.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andora',
         'AE' => 'Ujedinjeni Arapski Emirati',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/sr_Latn_BA.php b/src/Symfony/Component/Intl/Resources/data/regions/sr_Latn_BA.php
index 59fb9ddeb794b..9babaf4088967 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/sr_Latn_BA.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/sr_Latn_BA.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AX' => 'Olandska ostrva',
         'BL' => 'Sen Bartelemi',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/sr_Latn_ME.php b/src/Symfony/Component/Intl/Resources/data/regions/sr_Latn_ME.php
index b7050edcb12de..6f4449a44362d 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/sr_Latn_ME.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/sr_Latn_ME.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'BY' => 'Bjelorusija',
         'CG' => 'Kongo',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/sr_Latn_XK.php b/src/Symfony/Component/Intl/Resources/data/regions/sr_Latn_XK.php
index 6c9c9d860df05..8edec8aa8596a 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/sr_Latn_XK.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/sr_Latn_XK.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'CG' => 'Kongo',
         'CV' => 'Kabo Verde',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/sr_ME.php b/src/Symfony/Component/Intl/Resources/data/regions/sr_ME.php
index b7050edcb12de..6f4449a44362d 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/sr_ME.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/sr_ME.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'BY' => 'Bjelorusija',
         'CG' => 'Kongo',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/sr_XK.php b/src/Symfony/Component/Intl/Resources/data/regions/sr_XK.php
index 2e42f487d0717..4e4947f37e468 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/sr_XK.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/sr_XK.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'CG' => 'Конго',
         'CV' => 'Кабо Верде',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/st.php b/src/Symfony/Component/Intl/Resources/data/regions/st.php
index dbfc2cb733605..7852d943fbc57 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/st.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/st.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'LS' => 'Lesotho',
         'ZA' => 'Afrika Borwa',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/su.php b/src/Symfony/Component/Intl/Resources/data/regions/su.php
index 0d4c00a99aa29..b528f02a6282f 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/su.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/su.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'BR' => 'Brasil',
         'CN' => 'Tiongkok',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/sv.php b/src/Symfony/Component/Intl/Resources/data/regions/sv.php
index 7d4efc9fdf2dc..6eaf1b9fe91e7 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/sv.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/sv.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Förenade Arabemiraten',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/sw.php b/src/Symfony/Component/Intl/Resources/data/regions/sw.php
index 9d2cbdedcea1a..e008b3b5202ee 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/sw.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/sw.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Falme za Kiarabu',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/sw_CD.php b/src/Symfony/Component/Intl/Resources/data/regions/sw_CD.php
index a8cb17c12423f..ba7dc8f5364b9 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/sw_CD.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/sw_CD.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AF' => 'Afuganistani',
         'AZ' => 'Azabajani',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/sw_KE.php b/src/Symfony/Component/Intl/Resources/data/regions/sw_KE.php
index 72b512fd43d60..e0e765c77896d 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/sw_KE.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/sw_KE.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AF' => 'Afghanistani',
         'AG' => 'Antigua na Babuda',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ta.php b/src/Symfony/Component/Intl/Resources/data/regions/ta.php
index d90de31ba0835..1bd8e44bebe72 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ta.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ta.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'கொசோவோ',
+    ],
     'Names' => [
         'AD' => 'அன்டோரா',
         'AE' => 'ஐக்கிய அரபு எமிரேட்ஸ்',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/te.php b/src/Symfony/Component/Intl/Resources/data/regions/te.php
index 0f47b4f7eda8d..1d61f3ce932c1 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/te.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/te.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'కొసోవో',
+    ],
     'Names' => [
         'AD' => 'ఆండోరా',
         'AE' => 'యునైటెడ్ అరబ్ ఎమిరేట్స్',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/tg.php b/src/Symfony/Component/Intl/Resources/data/regions/tg.php
index 59d55b660cdec..9ed174f5067de 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/tg.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/tg.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Косово',
+    ],
     'Names' => [
         'AD' => 'Андорра',
         'AE' => 'Аморатҳои Муттаҳидаи Араб',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/th.php b/src/Symfony/Component/Intl/Resources/data/regions/th.php
index 31dcef430e048..6d517167bffd0 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/th.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/th.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'โคโซโว',
+    ],
     'Names' => [
         'AD' => 'อันดอร์รา',
         'AE' => 'สหรัฐอาหรับเอมิเรตส์',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ti.php b/src/Symfony/Component/Intl/Resources/data/regions/ti.php
index 08963041e556c..b151db1fec981 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ti.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ti.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'ኮሶቮ',
+    ],
     'Names' => [
         'AD' => 'ኣንዶራ',
         'AE' => 'ሕቡራት ኢማራት ዓረብ',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/tk.php b/src/Symfony/Component/Intl/Resources/data/regions/tk.php
index 9039331083877..2d374ff50d579 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/tk.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/tk.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosowo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Birleşen Arap Emirlikleri',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/tl.php b/src/Symfony/Component/Intl/Resources/data/regions/tl.php
index 7e214a3d3c24b..30bdb7776f42a 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/tl.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/tl.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'United Arab Emirates',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/tn.php b/src/Symfony/Component/Intl/Resources/data/regions/tn.php
index 0c0c418b8c9bb..74d0dc0233902 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/tn.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/tn.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'BW' => 'Botswana',
         'ZA' => 'Aforika Borwa',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/to.php b/src/Symfony/Component/Intl/Resources/data/regions/to.php
index 00eeb00ce94d1..a8a6a85a0a0b7 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/to.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/to.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kōsovo',
+    ],
     'Names' => [
         'AD' => 'ʻAnitola',
         'AE' => 'ʻAlepea Fakatahataha',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/tr.php b/src/Symfony/Component/Intl/Resources/data/regions/tr.php
index b2abb19fabd73..7160e0031e34e 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/tr.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/tr.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosova',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Birleşik Arap Emirlikleri',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/tt.php b/src/Symfony/Component/Intl/Resources/data/regions/tt.php
index 4bcd4ffa57b4e..1a7b340eab7a5 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/tt.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/tt.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Косово',
+    ],
     'Names' => [
         'AD' => 'Андорра',
         'AE' => 'Берләшкән Гарәп Әмирлекләре',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ug.php b/src/Symfony/Component/Intl/Resources/data/regions/ug.php
index 351cc82a946cc..81dad4b51d287 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ug.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ug.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'كوسوۋو',
+    ],
     'Names' => [
         'AD' => 'ئاندوررا',
         'AE' => 'ئەرەب بىرلەشمە خەلىپىلىكى',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/uk.php b/src/Symfony/Component/Intl/Resources/data/regions/uk.php
index f517f86365553..2b92cb684862c 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/uk.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/uk.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Косово',
+    ],
     'Names' => [
         'AD' => 'Андорра',
         'AE' => 'Обʼєднані Арабські Емірати',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ur.php b/src/Symfony/Component/Intl/Resources/data/regions/ur.php
index 62de2719cb4c2..2c36190b5d972 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ur.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ur.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'کوسووو',
+    ],
     'Names' => [
         'AD' => 'انڈورا',
         'AE' => 'متحدہ عرب امارات',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/ur_IN.php b/src/Symfony/Component/Intl/Resources/data/regions/ur_IN.php
index 544151cfa9b2d..f74ed0f3521e1 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/ur_IN.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/ur_IN.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AX' => 'جزائر آلینڈ',
         'BV' => 'جزیرہ بوویت',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/uz.php b/src/Symfony/Component/Intl/Resources/data/regions/uz.php
index f58195170ece7..6c161f13f22de 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/uz.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/uz.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Birlashgan Arab Amirliklari',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/uz_Arab.php b/src/Symfony/Component/Intl/Resources/data/regions/uz_Arab.php
index 55a84342affcd..59a63ef4f8e0f 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/uz_Arab.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/uz_Arab.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AF' => 'افغانستان',
     ],
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/uz_Cyrl.php b/src/Symfony/Component/Intl/Resources/data/regions/uz_Cyrl.php
index 91bb82b0fa46e..a68740be41e8c 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/uz_Cyrl.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/uz_Cyrl.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Косово',
+    ],
     'Names' => [
         'AD' => 'Андорра',
         'AE' => 'Бирлашган Араб Амирликлари',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/vi.php b/src/Symfony/Component/Intl/Resources/data/regions/vi.php
index fa6bd034a67f2..23442cc94f2ea 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/vi.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/vi.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosovo',
+    ],
     'Names' => [
         'AD' => 'Andorra',
         'AE' => 'Các Tiểu Vương quốc Ả Rập Thống nhất',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/wo.php b/src/Symfony/Component/Intl/Resources/data/regions/wo.php
index 244ea3830abe4..fc5df1e1f42a4 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/wo.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/wo.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kosowo',
+    ],
     'Names' => [
         'AD' => 'Andoor',
         'AE' => 'Emira Arab Ini',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/xh.php b/src/Symfony/Component/Intl/Resources/data/regions/xh.php
index 06e0ae305082d..caab20b057647 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/xh.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/xh.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'EKosovo',
+    ],
     'Names' => [
         'AD' => 'E-Andorra',
         'AE' => 'E-United Arab Emirates',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/yi.php b/src/Symfony/Component/Intl/Resources/data/regions/yi.php
index 2985675c66106..48cfa98cb5507 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/yi.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/yi.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'קאסאווא',
+    ],
     'Names' => [
         'AD' => 'אַנדארע',
         'AF' => 'אַפֿגהאַניסטאַן',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/yo.php b/src/Symfony/Component/Intl/Resources/data/regions/yo.php
index 75cf789bb2f01..3b00f29a2633d 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/yo.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/yo.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'Kòsófò',
+    ],
     'Names' => [
         'AD' => 'Ààndórà',
         'AE' => 'Ẹmirate ti Awọn Arabu',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/yo_BJ.php b/src/Symfony/Component/Intl/Resources/data/regions/yo_BJ.php
index b3c8029aa4409..75c5ce030b004 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/yo_BJ.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/yo_BJ.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AE' => 'Ɛmirate ti Awɔn Arabu',
         'AS' => 'Sámóánì ti Orílɛ́ède Àméríkà',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/za.php b/src/Symfony/Component/Intl/Resources/data/regions/za.php
index e7ab54b9cad30..4042508565dc1 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/za.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/za.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'CN' => 'Cunghgoz',
     ],
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/zh.php b/src/Symfony/Component/Intl/Resources/data/regions/zh.php
index 0a5eec8c34ce2..18003eb7039db 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/zh.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/zh.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => '科索沃',
+    ],
     'Names' => [
         'AD' => '安道尔',
         'AE' => '阿拉伯联合酋长国',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/zh_HK.php b/src/Symfony/Component/Intl/Resources/data/regions/zh_HK.php
index b7fb7282953f7..fa411f112439d 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/zh_HK.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/zh_HK.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AE' => '阿拉伯聯合酋長國',
         'AG' => '安提瓜和巴布達',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/zh_Hant.php b/src/Symfony/Component/Intl/Resources/data/regions/zh_Hant.php
index 805b5be9d9b83..a857028fe824e 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/zh_Hant.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/zh_Hant.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => '科索沃',
+    ],
     'Names' => [
         'AD' => '安道爾',
         'AE' => '阿拉伯聯合大公國',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/zh_Hant_HK.php b/src/Symfony/Component/Intl/Resources/data/regions/zh_Hant_HK.php
index b7fb7282953f7..fa411f112439d 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/zh_Hant_HK.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/zh_Hant_HK.php
@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'UserAssignedNames' => [],
     'Names' => [
         'AE' => '阿拉伯聯合酋長國',
         'AG' => '安提瓜和巴布達',
diff --git a/src/Symfony/Component/Intl/Resources/data/regions/zu.php b/src/Symfony/Component/Intl/Resources/data/regions/zu.php
index 02fed9e8e23c3..802d9ed65eab6 100644
--- a/src/Symfony/Component/Intl/Resources/data/regions/zu.php
+++ b/src/Symfony/Component/Intl/Resources/data/regions/zu.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'UserAssignedNames' => [
+        'XK' => 'i-Kosovo',
+    ],
     'Names' => [
         'AD' => 'i-Andorra',
         'AE' => 'i-United Arab Emirates',
diff --git a/src/Symfony/Component/Intl/Tests/CountriesEnvVarTest.php b/src/Symfony/Component/Intl/Tests/CountriesEnvVarTest.php
new file mode 100644
index 0000000000000..4f8cc0e1c97ce
--- /dev/null
+++ b/src/Symfony/Component/Intl/Tests/CountriesEnvVarTest.php
@@ -0,0 +1,41 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Intl\Tests;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Intl\Countries;
+
+/**
+ * @group intl-data
+ * @group intl-data-isolate
+ */
+class CountriesEnvVarTest extends TestCase
+{
+    public function testWhenEnvVarNotSet(): void
+    {
+        $this->assertFalse(Countries::exists('XK'));
+    }
+
+    public function testWhenEnvVarSetFalse(): void
+    {
+        putenv('SYMFONY_INTL_WITH_USER_ASSIGNED=false');
+
+        $this->assertFalse(Countries::exists('XK'));
+    }
+
+    public function testWhenEnvVarSetTrue(): void
+    {
+        putenv('SYMFONY_INTL_WITH_USER_ASSIGNED=true');
+
+        $this->assertTrue(Countries::exists('XK'));
+    }
+}
diff --git a/src/Symfony/Component/Intl/Tests/CountriesWithUserAssignedTest.php b/src/Symfony/Component/Intl/Tests/CountriesWithUserAssignedTest.php
new file mode 100644
index 0000000000000..02027df8ac0da
--- /dev/null
+++ b/src/Symfony/Component/Intl/Tests/CountriesWithUserAssignedTest.php
@@ -0,0 +1,1010 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Intl\Tests;
+
+use Symfony\Component\Intl\Countries;
+use Symfony\Component\Intl\Exception\MissingResourceException;
+use Symfony\Component\Intl\Util\IntlTestHelper;
+
+/**
+ * @group intl-data
+ */
+class CountriesWithUserAssignedTest extends ResourceBundleTestCase
+{
+    /*
+     * The below arrays document the state of ICU data bundled with this package
+     * when SYMFONY_ALLOW_OPTIONAL_USER_ASSIGNED is set to `true`.
+     */
+    private const COUNTRIES_WITH_USER_ASSIGNED = [
+        'AD',
+        'AE',
+        'AF',
+        'AG',
+        'AI',
+        'AL',
+        'AM',
+        'AO',
+        'AQ',
+        'AR',
+        'AS',
+        'AT',
+        'AU',
+        'AW',
+        'AX',
+        'AZ',
+        'BA',
+        'BB',
+        'BD',
+        'BE',
+        'BF',
+        'BG',
+        'BH',
+        'BI',
+        'BJ',
+        'BL',
+        'BM',
+        'BN',
+        'BO',
+        'BQ',
+        'BR',
+        'BS',
+        'BT',
+        'BV',
+        'BW',
+        'BY',
+        'BZ',
+        'CA',
+        'CC',
+        'CD',
+        'CF',
+        'CG',
+        'CH',
+        'CI',
+        'CK',
+        'CL',
+        'CM',
+        'CN',
+        'CO',
+        'CR',
+        'CU',
+        'CV',
+        'CW',
+        'CX',
+        'CY',
+        'CZ',
+        'DE',
+        'DJ',
+        'DK',
+        'DM',
+        'DO',
+        'DZ',
+        'EC',
+        'EE',
+        'EG',
+        'EH',
+        'ER',
+        'ES',
+        'ET',
+        'FI',
+        'FJ',
+        'FK',
+        'FM',
+        'FO',
+        'FR',
+        'GA',
+        'GB',
+        'GD',
+        'GE',
+        'GF',
+        'GG',
+        'GH',
+        'GI',
+        'GL',
+        'GM',
+        'GN',
+        'GP',
+        'GQ',
+        'GR',
+        'GS',
+        'GT',
+        'GU',
+        'GW',
+        'GY',
+        'HK',
+        'HM',
+        'HN',
+        'HR',
+        'HT',
+        'HU',
+        'ID',
+        'IE',
+        'IL',
+        'IM',
+        'IN',
+        'IO',
+        'IQ',
+        'IR',
+        'IS',
+        'IT',
+        'JE',
+        'JM',
+        'JO',
+        'JP',
+        'KE',
+        'KG',
+        'KH',
+        'KI',
+        'KM',
+        'KN',
+        'KP',
+        'KR',
+        'KW',
+        'KY',
+        'KZ',
+        'LA',
+        'LB',
+        'LC',
+        'LI',
+        'LK',
+        'LR',
+        'LS',
+        'LT',
+        'LU',
+        'LV',
+        'LY',
+        'MA',
+        'MC',
+        'MD',
+        'ME',
+        'MF',
+        'MG',
+        'MH',
+        'MK',
+        'ML',
+        'MM',
+        'MN',
+        'MO',
+        'MP',
+        'MQ',
+        'MR',
+        'MS',
+        'MT',
+        'MU',
+        'MV',
+        'MW',
+        'MX',
+        'MY',
+        'MZ',
+        'NA',
+        'NC',
+        'NE',
+        'NF',
+        'NG',
+        'NI',
+        'NL',
+        'NO',
+        'NP',
+        'NR',
+        'NU',
+        'NZ',
+        'OM',
+        'PA',
+        'PE',
+        'PF',
+        'PG',
+        'PH',
+        'PK',
+        'PL',
+        'PM',
+        'PN',
+        'PR',
+        'PS',
+        'PT',
+        'PW',
+        'PY',
+        'QA',
+        'RE',
+        'RO',
+        'RS',
+        'RU',
+        'RW',
+        'SA',
+        'SB',
+        'SC',
+        'SD',
+        'SE',
+        'SG',
+        'SH',
+        'SI',
+        'SJ',
+        'SK',
+        'SL',
+        'SM',
+        'SN',
+        'SO',
+        'SR',
+        'SS',
+        'ST',
+        'SV',
+        'SX',
+        'SY',
+        'SZ',
+        'TC',
+        'TD',
+        'TF',
+        'TG',
+        'TH',
+        'TJ',
+        'TK',
+        'TL',
+        'TM',
+        'TN',
+        'TO',
+        'TR',
+        'TT',
+        'TV',
+        'TW',
+        'TZ',
+        'UA',
+        'UG',
+        'UM',
+        'US',
+        'UY',
+        'UZ',
+        'VA',
+        'VC',
+        'VE',
+        'VG',
+        'VI',
+        'VN',
+        'VU',
+        'WF',
+        'WS',
+        'YE',
+        'YT',
+        'ZA',
+        'ZM',
+        'ZW',
+        'XK',
+    ];
+
+    private const ALPHA2_TO_ALPHA3_WITH_USER_ASSIGNED = [
+        'AW' => 'ABW',
+        'AF' => 'AFG',
+        'AO' => 'AGO',
+        'AI' => 'AIA',
+        'AX' => 'ALA',
+        'AL' => 'ALB',
+        'AD' => 'AND',
+        'AE' => 'ARE',
+        'AR' => 'ARG',
+        'AM' => 'ARM',
+        'AS' => 'ASM',
+        'AQ' => 'ATA',
+        'TF' => 'ATF',
+        'AG' => 'ATG',
+        'AU' => 'AUS',
+        'AT' => 'AUT',
+        'AZ' => 'AZE',
+        'BI' => 'BDI',
+        'BE' => 'BEL',
+        'BJ' => 'BEN',
+        'BQ' => 'BES',
+        'BF' => 'BFA',
+        'BD' => 'BGD',
+        'BG' => 'BGR',
+        'BH' => 'BHR',
+        'BS' => 'BHS',
+        'BA' => 'BIH',
+        'BL' => 'BLM',
+        'BY' => 'BLR',
+        'BZ' => 'BLZ',
+        'BM' => 'BMU',
+        'BO' => 'BOL',
+        'BR' => 'BRA',
+        'BB' => 'BRB',
+        'BN' => 'BRN',
+        'BT' => 'BTN',
+        'BV' => 'BVT',
+        'BW' => 'BWA',
+        'CF' => 'CAF',
+        'CA' => 'CAN',
+        'CC' => 'CCK',
+        'CH' => 'CHE',
+        'CL' => 'CHL',
+        'CN' => 'CHN',
+        'CI' => 'CIV',
+        'CM' => 'CMR',
+        'CD' => 'COD',
+        'CG' => 'COG',
+        'CK' => 'COK',
+        'CO' => 'COL',
+        'KM' => 'COM',
+        'CV' => 'CPV',
+        'CR' => 'CRI',
+        'CU' => 'CUB',
+        'CW' => 'CUW',
+        'CX' => 'CXR',
+        'KY' => 'CYM',
+        'CY' => 'CYP',
+        'CZ' => 'CZE',
+        'DE' => 'DEU',
+        'DJ' => 'DJI',
+        'DM' => 'DMA',
+        'DK' => 'DNK',
+        'DO' => 'DOM',
+        'DZ' => 'DZA',
+        'EC' => 'ECU',
+        'EG' => 'EGY',
+        'ER' => 'ERI',
+        'EH' => 'ESH',
+        'ES' => 'ESP',
+        'EE' => 'EST',
+        'ET' => 'ETH',
+        'FI' => 'FIN',
+        'FJ' => 'FJI',
+        'FK' => 'FLK',
+        'FR' => 'FRA',
+        'FO' => 'FRO',
+        'FM' => 'FSM',
+        'GA' => 'GAB',
+        'GB' => 'GBR',
+        'GE' => 'GEO',
+        'GG' => 'GGY',
+        'GH' => 'GHA',
+        'GI' => 'GIB',
+        'GN' => 'GIN',
+        'GP' => 'GLP',
+        'GM' => 'GMB',
+        'GW' => 'GNB',
+        'GQ' => 'GNQ',
+        'GR' => 'GRC',
+        'GD' => 'GRD',
+        'GL' => 'GRL',
+        'GT' => 'GTM',
+        'GF' => 'GUF',
+        'GU' => 'GUM',
+        'GY' => 'GUY',
+        'HK' => 'HKG',
+        'HM' => 'HMD',
+        'HN' => 'HND',
+        'HR' => 'HRV',
+        'HT' => 'HTI',
+        'HU' => 'HUN',
+        'ID' => 'IDN',
+        'IM' => 'IMN',
+        'IN' => 'IND',
+        'IO' => 'IOT',
+        'IE' => 'IRL',
+        'IR' => 'IRN',
+        'IQ' => 'IRQ',
+        'IS' => 'ISL',
+        'IL' => 'ISR',
+        'IT' => 'ITA',
+        'JM' => 'JAM',
+        'JE' => 'JEY',
+        'JO' => 'JOR',
+        'JP' => 'JPN',
+        'KZ' => 'KAZ',
+        'KE' => 'KEN',
+        'KG' => 'KGZ',
+        'KH' => 'KHM',
+        'KI' => 'KIR',
+        'KN' => 'KNA',
+        'KR' => 'KOR',
+        'KW' => 'KWT',
+        'LA' => 'LAO',
+        'LB' => 'LBN',
+        'LR' => 'LBR',
+        'LY' => 'LBY',
+        'LC' => 'LCA',
+        'LI' => 'LIE',
+        'LK' => 'LKA',
+        'LS' => 'LSO',
+        'LT' => 'LTU',
+        'LU' => 'LUX',
+        'LV' => 'LVA',
+        'MO' => 'MAC',
+        'MF' => 'MAF',
+        'MA' => 'MAR',
+        'MC' => 'MCO',
+        'MD' => 'MDA',
+        'MG' => 'MDG',
+        'MV' => 'MDV',
+        'MX' => 'MEX',
+        'MH' => 'MHL',
+        'MK' => 'MKD',
+        'ML' => 'MLI',
+        'MT' => 'MLT',
+        'MM' => 'MMR',
+        'ME' => 'MNE',
+        'MN' => 'MNG',
+        'MP' => 'MNP',
+        'MZ' => 'MOZ',
+        'MR' => 'MRT',
+        'MS' => 'MSR',
+        'MQ' => 'MTQ',
+        'MU' => 'MUS',
+        'MW' => 'MWI',
+        'MY' => 'MYS',
+        'YT' => 'MYT',
+        'NA' => 'NAM',
+        'NC' => 'NCL',
+        'NE' => 'NER',
+        'NF' => 'NFK',
+        'NG' => 'NGA',
+        'NI' => 'NIC',
+        'NU' => 'NIU',
+        'NL' => 'NLD',
+        'NO' => 'NOR',
+        'NP' => 'NPL',
+        'NR' => 'NRU',
+        'NZ' => 'NZL',
+        'OM' => 'OMN',
+        'PK' => 'PAK',
+        'PA' => 'PAN',
+        'PN' => 'PCN',
+        'PE' => 'PER',
+        'PH' => 'PHL',
+        'PW' => 'PLW',
+        'PG' => 'PNG',
+        'PL' => 'POL',
+        'PR' => 'PRI',
+        'KP' => 'PRK',
+        'PT' => 'PRT',
+        'PY' => 'PRY',
+        'PS' => 'PSE',
+        'PF' => 'PYF',
+        'QA' => 'QAT',
+        'RE' => 'REU',
+        'RO' => 'ROU',
+        'RU' => 'RUS',
+        'RW' => 'RWA',
+        'SA' => 'SAU',
+        'SD' => 'SDN',
+        'SN' => 'SEN',
+        'SG' => 'SGP',
+        'GS' => 'SGS',
+        'SH' => 'SHN',
+        'SJ' => 'SJM',
+        'SB' => 'SLB',
+        'SL' => 'SLE',
+        'SV' => 'SLV',
+        'SM' => 'SMR',
+        'SO' => 'SOM',
+        'PM' => 'SPM',
+        'RS' => 'SRB',
+        'SS' => 'SSD',
+        'ST' => 'STP',
+        'SR' => 'SUR',
+        'SK' => 'SVK',
+        'SI' => 'SVN',
+        'SE' => 'SWE',
+        'SZ' => 'SWZ',
+        'SX' => 'SXM',
+        'SC' => 'SYC',
+        'SY' => 'SYR',
+        'TC' => 'TCA',
+        'TD' => 'TCD',
+        'TG' => 'TGO',
+        'TH' => 'THA',
+        'TJ' => 'TJK',
+        'TK' => 'TKL',
+        'TM' => 'TKM',
+        'TL' => 'TLS',
+        'TO' => 'TON',
+        'TT' => 'TTO',
+        'TN' => 'TUN',
+        'TR' => 'TUR',
+        'TV' => 'TUV',
+        'TW' => 'TWN',
+        'TZ' => 'TZA',
+        'UG' => 'UGA',
+        'UA' => 'UKR',
+        'UM' => 'UMI',
+        'UY' => 'URY',
+        'US' => 'USA',
+        'UZ' => 'UZB',
+        'VA' => 'VAT',
+        'VC' => 'VCT',
+        'VE' => 'VEN',
+        'VG' => 'VGB',
+        'VI' => 'VIR',
+        'VN' => 'VNM',
+        'VU' => 'VUT',
+        'WF' => 'WLF',
+        'WS' => 'WSM',
+        'YE' => 'YEM',
+        'ZA' => 'ZAF',
+        'ZM' => 'ZMB',
+        'ZW' => 'ZWE',
+        'XK' => 'XKK',
+    ];
+
+    private const ALPHA2_TO_NUMERIC_WITH_USER_ASSIGNED = [
+        'AD' => '020',
+        'AE' => '784',
+        'AF' => '004',
+        'AG' => '028',
+        'AI' => '660',
+        'AL' => '008',
+        'AM' => '051',
+        'AO' => '024',
+        'AQ' => '010',
+        'AR' => '032',
+        'AS' => '016',
+        'AT' => '040',
+        'AU' => '036',
+        'AW' => '533',
+        'AX' => '248',
+        'AZ' => '031',
+        'BA' => '070',
+        'BB' => '052',
+        'BD' => '050',
+        'BE' => '056',
+        'BF' => '854',
+        'BG' => '100',
+        'BH' => '048',
+        'BI' => '108',
+        'BJ' => '204',
+        'BL' => '652',
+        'BM' => '060',
+        'BN' => '096',
+        'BO' => '068',
+        'BQ' => '535',
+        'BR' => '076',
+        'BS' => '044',
+        'BT' => '064',
+        'BV' => '074',
+        'BW' => '072',
+        'BY' => '112',
+        'BZ' => '084',
+        'CA' => '124',
+        'CC' => '166',
+        'CD' => '180',
+        'CF' => '140',
+        'CG' => '178',
+        'CH' => '756',
+        'CI' => '384',
+        'CK' => '184',
+        'CL' => '152',
+        'CM' => '120',
+        'CN' => '156',
+        'CO' => '170',
+        'CR' => '188',
+        'CU' => '192',
+        'CV' => '132',
+        'CW' => '531',
+        'CX' => '162',
+        'CY' => '196',
+        'CZ' => '203',
+        'DE' => '276',
+        'DJ' => '262',
+        'DK' => '208',
+        'DM' => '212',
+        'DO' => '214',
+        'DZ' => '012',
+        'EC' => '218',
+        'EE' => '233',
+        'EG' => '818',
+        'EH' => '732',
+        'ER' => '232',
+        'ES' => '724',
+        'ET' => '231',
+        'FI' => '246',
+        'FJ' => '242',
+        'FK' => '238',
+        'FM' => '583',
+        'FO' => '234',
+        'FR' => '250',
+        'GA' => '266',
+        'GB' => '826',
+        'GD' => '308',
+        'GE' => '268',
+        'GF' => '254',
+        'GG' => '831',
+        'GH' => '288',
+        'GI' => '292',
+        'GL' => '304',
+        'GM' => '270',
+        'GN' => '324',
+        'GP' => '312',
+        'GQ' => '226',
+        'GR' => '300',
+        'GS' => '239',
+        'GT' => '320',
+        'GU' => '316',
+        'GW' => '624',
+        'GY' => '328',
+        'HK' => '344',
+        'HM' => '334',
+        'HN' => '340',
+        'HR' => '191',
+        'HT' => '332',
+        'HU' => '348',
+        'ID' => '360',
+        'IE' => '372',
+        'IL' => '376',
+        'IM' => '833',
+        'IN' => '356',
+        'IO' => '086',
+        'IQ' => '368',
+        'IR' => '364',
+        'IS' => '352',
+        'IT' => '380',
+        'JE' => '832',
+        'JM' => '388',
+        'JO' => '400',
+        'JP' => '392',
+        'KE' => '404',
+        'KG' => '417',
+        'KH' => '116',
+        'KI' => '296',
+        'KM' => '174',
+        'KN' => '659',
+        'KP' => '408',
+        'KR' => '410',
+        'KW' => '414',
+        'KY' => '136',
+        'KZ' => '398',
+        'LA' => '418',
+        'LB' => '422',
+        'LC' => '662',
+        'LI' => '438',
+        'LK' => '144',
+        'LR' => '430',
+        'LS' => '426',
+        'LT' => '440',
+        'LU' => '442',
+        'LV' => '428',
+        'LY' => '434',
+        'MA' => '504',
+        'MC' => '492',
+        'MD' => '498',
+        'ME' => '499',
+        'MF' => '663',
+        'MG' => '450',
+        'MH' => '584',
+        'MK' => '807',
+        'ML' => '466',
+        'MM' => '104',
+        'MN' => '496',
+        'MO' => '446',
+        'MP' => '580',
+        'MQ' => '474',
+        'MR' => '478',
+        'MS' => '500',
+        'MT' => '470',
+        'MU' => '480',
+        'MV' => '462',
+        'MW' => '454',
+        'MX' => '484',
+        'MY' => '458',
+        'MZ' => '508',
+        'NA' => '516',
+        'NC' => '540',
+        'NE' => '562',
+        'NF' => '574',
+        'NG' => '566',
+        'NI' => '558',
+        'NL' => '528',
+        'NO' => '578',
+        'NP' => '524',
+        'NR' => '520',
+        'NU' => '570',
+        'NZ' => '554',
+        'OM' => '512',
+        'PA' => '591',
+        'PE' => '604',
+        'PF' => '258',
+        'PG' => '598',
+        'PH' => '608',
+        'PK' => '586',
+        'PL' => '616',
+        'PM' => '666',
+        'PN' => '612',
+        'PR' => '630',
+        'PS' => '275',
+        'PT' => '620',
+        'PW' => '585',
+        'PY' => '600',
+        'QA' => '634',
+        'RE' => '638',
+        'RO' => '642',
+        'RS' => '688',
+        'RU' => '643',
+        'RW' => '646',
+        'SA' => '682',
+        'SB' => '090',
+        'SC' => '690',
+        'SD' => '729',
+        'SE' => '752',
+        'SG' => '702',
+        'SH' => '654',
+        'SI' => '705',
+        'SJ' => '744',
+        'SK' => '703',
+        'SL' => '694',
+        'SM' => '674',
+        'SN' => '686',
+        'SO' => '706',
+        'SR' => '740',
+        'SS' => '728',
+        'ST' => '678',
+        'SV' => '222',
+        'SX' => '534',
+        'SY' => '760',
+        'SZ' => '748',
+        'TC' => '796',
+        'TD' => '148',
+        'TF' => '260',
+        'TG' => '768',
+        'TH' => '764',
+        'TJ' => '762',
+        'TK' => '772',
+        'TL' => '626',
+        'TM' => '795',
+        'TN' => '788',
+        'TO' => '776',
+        'TR' => '792',
+        'TT' => '780',
+        'TV' => '798',
+        'TW' => '158',
+        'TZ' => '834',
+        'UA' => '804',
+        'UG' => '800',
+        'UM' => '581',
+        'US' => '840',
+        'UY' => '858',
+        'UZ' => '860',
+        'VA' => '336',
+        'VC' => '670',
+        'VE' => '862',
+        'VG' => '092',
+        'VI' => '850',
+        'VN' => '704',
+        'VU' => '548',
+        'WF' => '876',
+        'WS' => '882',
+        'YE' => '887',
+        'YT' => '175',
+        'ZA' => '710',
+        'ZM' => '894',
+        'ZW' => '716',
+        'XK' => '983',
+    ];
+
+    public static function setUpBeforeClass(): void
+    {
+        // @see CountriesEnvVarTest for ENV var interaction
+        Countries::withUserAssigned(true);
+    }
+
+    public static function tearDownAfterClass(): void
+    {
+        // we are not interested in SYMFONY_INTL_WITH_USER_ASSIGNED outside this test class
+        Countries::withUserAssigned(false);
+    }
+
+    public function testAllGettersGenerateTheSameDataSetCount(): void
+    {
+        $expected = count(self::COUNTRIES_WITH_USER_ASSIGNED);
+        $alpha2Count = count(Countries::getCountryCodes());
+        $alpha3Count = count(Countries::getAlpha3Codes());
+        $numericCodesCount = count(Countries::getNumericCodes());
+        $namesCount = count(Countries::getNames());
+
+        // we compare against our test list to check that optional user assigned is included
+        $this->assertEquals($expected, $namesCount, 'Names count does not match');
+        $this->assertEquals($expected, $alpha2Count, 'Alpha 2 count does not match');
+        $this->assertEquals($expected, $alpha3Count, 'Alpha 3 count does not match');
+        $this->assertEquals($expected, $numericCodesCount, 'Numeric codes count does not match');
+    }
+
+    public function testGetCountryCodes(): void
+    {
+        $this->assertSame(self::COUNTRIES_WITH_USER_ASSIGNED, Countries::getCountryCodes());
+    }
+
+    /**
+     * @dataProvider provideLocales
+     */
+    public function testGetNames($displayLocale): void
+    {
+        if ('en' !== $displayLocale) {
+            IntlTestHelper::requireFullIntl($this);
+        }
+
+        $countries = array_keys(Countries::getNames($displayLocale));
+
+        // Can't use assertSame(), because country names differ in different locales
+        // we want to know that both arrays are canonically equal though
+        $this->assertEqualsCanonicalizing(self::COUNTRIES_WITH_USER_ASSIGNED, $countries);
+    }
+
+    /**
+     * This test is for backward compatibility. testGetNames already checks `XK` is included
+     *
+     * @dataProvider provideLocaleAliases
+     */
+    public function testGetNamesSupportsAliases($alias, $ofLocale): void
+    {
+        if ('en' !== $ofLocale) {
+            IntlTestHelper::requireFullIntl($this);
+        }
+
+        // Can't use assertSame(), because some aliases contain scripts with
+        // different collation (=order of output) than their aliased locale
+        // e.g. sr_Latn_ME => sr_ME
+        $this->assertEquals(Countries::getNames($ofLocale), Countries::getNames($alias));
+    }
+
+    /**
+     * This test is for backward compatibility. testGetNames already checks `XK` is included
+     *
+     * @dataProvider provideLocales
+     */
+    public function testGetName($displayLocale)
+    {
+        if ('en' !== $displayLocale) {
+            IntlTestHelper::requireFullIntl($this);
+        }
+
+        $names = Countries::getNames($displayLocale);
+
+        foreach ($names as $country => $name) {
+            $this->assertSame($name, Countries::getName($country, $displayLocale));
+        }
+    }
+
+    /**
+     * @requires extension intl
+     */
+    public function testLocaleAliasesAreLoaded()
+    {
+        \Locale::setDefault('zh_TW');
+        $countryNameZhTw = Countries::getName('AD');
+
+        \Locale::setDefault('zh_Hant_TW');
+        $countryNameHantZhTw = Countries::getName('AD');
+
+        \Locale::setDefault('zh');
+        $countryNameZh = Countries::getName('AD');
+
+        $this->assertSame($countryNameZhTw, $countryNameHantZhTw, 'zh_TW is an alias to zh_Hant_TW');
+        $this->assertNotSame($countryNameZh, $countryNameZhTw, 'zh_TW does not fall back to zh');
+    }
+
+    public function testGetNameWithInvalidCountryCode(): void
+    {
+        $this->expectException(MissingResourceException::class);
+        Countries::getName('PAL'); // PSE is commonly confused with PAL
+    }
+
+    public function testExists(): void
+    {
+        $this->assertTrue(Countries::exists('NL'));
+        $this->assertTrue(Countries::exists('XK'));
+        $this->assertFalse(Countries::exists('ZZ'));
+    }
+
+    public function testGetAlpha3Codes(): void
+    {
+        $this->assertSame(self::ALPHA2_TO_ALPHA3_WITH_USER_ASSIGNED, Countries::getAlpha3Codes());
+    }
+
+    public function testGetAlpha3Code(): void
+    {
+        foreach (self::COUNTRIES_WITH_USER_ASSIGNED as $country) {
+            $this->assertSame(self::ALPHA2_TO_ALPHA3_WITH_USER_ASSIGNED[$country], Countries::getAlpha3Code($country));
+        }
+    }
+
+    public function testGetAlpha2Code(): void
+    {
+        foreach (self::COUNTRIES_WITH_USER_ASSIGNED as $alpha2Code) {
+            $alpha3Code = self::ALPHA2_TO_ALPHA3_WITH_USER_ASSIGNED[$alpha2Code];
+            $this->assertSame($alpha2Code, Countries::getAlpha2Code($alpha3Code));
+        }
+    }
+
+    public function testAlpha3CodeExists(): void
+    {
+        $this->assertTrue(Countries::alpha3CodeExists('ALB'));
+        $this->assertTrue(Countries::alpha3CodeExists('DEU'));
+        $this->assertTrue(Countries::alpha3CodeExists('XKK'));
+        $this->assertFalse(Countries::alpha3CodeExists('DE'));
+        $this->assertFalse(Countries::alpha3CodeExists('URU'));
+        $this->assertFalse(Countries::alpha3CodeExists('ZZZ'));
+    }
+
+    /**
+     * @dataProvider provideLocales
+     */
+    public function testGetAlpha3Name($displayLocale): void
+    {
+        if ('en' !== $displayLocale) {
+            IntlTestHelper::requireFullIntl($this);
+        }
+
+        $names = Countries::getNames($displayLocale);
+
+        foreach ($names as $alpha2 => $name) {
+            $alpha3 = self::ALPHA2_TO_ALPHA3_WITH_USER_ASSIGNED[$alpha2];
+            $this->assertSame($name, Countries::getAlpha3Name($alpha3, $displayLocale));
+        }
+    }
+
+    public function testGetAlpha3NameWithInvalidCountryCode(): void
+    {
+        $this->expectException(MissingResourceException::class);
+
+        Countries::getAlpha3Name('ZZZ');
+    }
+
+    /**
+     * @dataProvider provideLocales
+     */
+    public function testGetAlpha3Names($displayLocale)
+    {
+        if ('en' !== $displayLocale) {
+            IntlTestHelper::requireFullIntl($this);
+        }
+
+        $names = Countries::getAlpha3Names($displayLocale);
+
+        $alpha3Codes = array_keys($names);
+        $this->assertEqualsCanonicalizing(array_values(self::ALPHA2_TO_ALPHA3_WITH_USER_ASSIGNED), $alpha3Codes);
+
+        $alpha2Names = Countries::getNames($displayLocale);
+        $this->assertEqualsCanonicalizing(array_values($alpha2Names), array_values($names));
+    }
+
+    public function testGetNumericCodes(): void
+    {
+        $this->assertSame(self::ALPHA2_TO_NUMERIC_WITH_USER_ASSIGNED, Countries::getNumericCodes());
+    }
+
+    public function testGetNumericCode(): void
+    {
+        foreach (self::COUNTRIES_WITH_USER_ASSIGNED as $country) {
+            $this->assertSame(self::ALPHA2_TO_NUMERIC_WITH_USER_ASSIGNED[$country], Countries::getNumericCode($country));
+        }
+    }
+
+    public function testNumericCodeExists(): void
+    {
+        $this->assertTrue(Countries::numericCodeExists('250'));
+        $this->assertTrue(Countries::numericCodeExists('008'));
+        $this->assertTrue(Countries::numericCodeExists('716'));
+        $this->assertTrue(Countries::numericCodeExists('983')); // this is `XK`
+        $this->assertFalse(Countries::numericCodeExists('667'));
+    }
+
+    public function testGetAlpha2FromNumeric(): void
+    {
+        $alpha2Lookup = array_flip(self::ALPHA2_TO_NUMERIC_WITH_USER_ASSIGNED);
+
+        foreach (self::ALPHA2_TO_NUMERIC_WITH_USER_ASSIGNED as $numeric) {
+            $this->assertSame($alpha2Lookup[$numeric], Countries::getAlpha2FromNumeric($numeric));
+        }
+    }
+
+    public function testNumericCodesDoNotContainDenyListItems(): void
+    {
+        $numericCodes = Countries::getNumericCodes();
+
+        $this->assertArrayNotHasKey('EZ', $numericCodes);
+        $this->assertArrayNotHasKey('XA', $numericCodes);
+        $this->assertArrayNotHasKey('ZZ', $numericCodes);
+    }
+}
diff --git a/src/Symfony/Component/Intl/Tests/TimezonesTest.php b/src/Symfony/Component/Intl/Tests/TimezonesTest.php
index 591b82cb44ed4..dcba36e3ac4a6 100644
--- a/src/Symfony/Component/Intl/Tests/TimezonesTest.php
+++ b/src/Symfony/Component/Intl/Tests/TimezonesTest.php
@@ -23,6 +23,258 @@ class TimezonesTest extends ResourceBundleTestCase
 {
     // The below arrays document the state of the ICU data bundled with this package.
 
+    private const COUNTRIES = [
+        ['AD'],
+        ['AE'],
+        ['AF'],
+        ['AG'],
+        ['AI'],
+        ['AL'],
+        ['AM'],
+        ['AO'],
+        ['AQ'],
+        ['AR'],
+        ['AS'],
+        ['AT'],
+        ['AU'],
+        ['AW'],
+        ['AX'],
+        ['AZ'],
+        ['BA'],
+        ['BB'],
+        ['BD'],
+        ['BE'],
+        ['BF'],
+        ['BG'],
+        ['BH'],
+        ['BI'],
+        ['BJ'],
+        ['BL'],
+        ['BM'],
+        ['BN'],
+        ['BO'],
+        ['BQ'],
+        ['BR'],
+        ['BS'],
+        ['BT'],
+        ['BV'],
+        ['BW'],
+        ['BY'],
+        ['BZ'],
+        ['CA'],
+        ['CC'],
+        ['CD'],
+        ['CF'],
+        ['CG'],
+        ['CH'],
+        ['CI'],
+        ['CK'],
+        ['CL'],
+        ['CM'],
+        ['CN'],
+        ['CO'],
+        ['CR'],
+        ['CU'],
+        ['CV'],
+        ['CW'],
+        ['CX'],
+        ['CY'],
+        ['CZ'],
+        ['DE'],
+        ['DJ'],
+        ['DK'],
+        ['DM'],
+        ['DO'],
+        ['DZ'],
+        ['EC'],
+        ['EE'],
+        ['EG'],
+        ['EH'],
+        ['ER'],
+        ['ES'],
+        ['ET'],
+        ['FI'],
+        ['FJ'],
+        ['FK'],
+        ['FM'],
+        ['FO'],
+        ['FR'],
+        ['GA'],
+        ['GB'],
+        ['GD'],
+        ['GE'],
+        ['GF'],
+        ['GG'],
+        ['GH'],
+        ['GI'],
+        ['GL'],
+        ['GM'],
+        ['GN'],
+        ['GP'],
+        ['GQ'],
+        ['GR'],
+        ['GS'],
+        ['GT'],
+        ['GU'],
+        ['GW'],
+        ['GY'],
+        ['HK'],
+        ['HM'],
+        ['HN'],
+        ['HR'],
+        ['HT'],
+        ['HU'],
+        ['ID'],
+        ['IE'],
+        ['IL'],
+        ['IM'],
+        ['IN'],
+        ['IO'],
+        ['IQ'],
+        ['IR'],
+        ['IS'],
+        ['IT'],
+        ['JE'],
+        ['JM'],
+        ['JO'],
+        ['JP'],
+        ['KE'],
+        ['KG'],
+        ['KH'],
+        ['KI'],
+        ['KM'],
+        ['KN'],
+        ['KP'],
+        ['KR'],
+        ['KW'],
+        ['KY'],
+        ['KZ'],
+        ['LA'],
+        ['LB'],
+        ['LC'],
+        ['LI'],
+        ['LK'],
+        ['LR'],
+        ['LS'],
+        ['LT'],
+        ['LU'],
+        ['LV'],
+        ['LY'],
+        ['MA'],
+        ['MC'],
+        ['MD'],
+        ['ME'],
+        ['MF'],
+        ['MG'],
+        ['MH'],
+        ['MK'],
+        ['ML'],
+        ['MM'],
+        ['MN'],
+        ['MO'],
+        ['MP'],
+        ['MQ'],
+        ['MR'],
+        ['MS'],
+        ['MT'],
+        ['MU'],
+        ['MV'],
+        ['MW'],
+        ['MX'],
+        ['MY'],
+        ['MZ'],
+        ['NA'],
+        ['NC'],
+        ['NE'],
+        ['NF'],
+        ['NG'],
+        ['NI'],
+        ['NL'],
+        ['NO'],
+        ['NP'],
+        ['NR'],
+        ['NU'],
+        ['NZ'],
+        ['OM'],
+        ['PA'],
+        ['PE'],
+        ['PF'],
+        ['PG'],
+        ['PH'],
+        ['PK'],
+        ['PL'],
+        ['PM'],
+        ['PN'],
+        ['PR'],
+        ['PS'],
+        ['PT'],
+        ['PW'],
+        ['PY'],
+        ['QA'],
+        ['RE'],
+        ['RO'],
+        ['RS'],
+        ['RU'],
+        ['RW'],
+        ['SA'],
+        ['SB'],
+        ['SC'],
+        ['SD'],
+        ['SE'],
+        ['SG'],
+        ['SH'],
+        ['SI'],
+        ['SJ'],
+        ['SK'],
+        ['SL'],
+        ['SM'],
+        ['SN'],
+        ['SO'],
+        ['SR'],
+        ['SS'],
+        ['ST'],
+        ['SV'],
+        ['SX'],
+        ['SY'],
+        ['SZ'],
+        ['TC'],
+        ['TD'],
+        ['TF'],
+        ['TG'],
+        ['TH'],
+        ['TJ'],
+        ['TK'],
+        ['TL'],
+        ['TM'],
+        ['TN'],
+        ['TO'],
+        ['TR'],
+        ['TT'],
+        ['TV'],
+        ['TW'],
+        ['TZ'],
+        ['UA'],
+        ['UG'],
+        ['UM'],
+        ['US'],
+        ['UY'],
+        ['UZ'],
+        ['VA'],
+        ['VC'],
+        ['VE'],
+        ['VG'],
+        ['VI'],
+        ['VN'],
+        ['VU'],
+        ['WF'],
+        ['WS'],
+        ['YE'],
+        ['YT'],
+        ['ZA'],
+        ['ZM'],
+        ['ZW'],
+    ];
+
     private const ZONES = [
         'Africa/Abidjan',
         'Africa/Accra',
@@ -665,7 +917,7 @@ public function testForCountryCodeAvailability(string $country)
 
     public static function provideCountries(): iterable
     {
-        return array_map(fn ($country) => [$country], Countries::getCountryCodes());
+        return self::COUNTRIES;
     }
 
     public function testGetRawOffsetChangeTimeCountry()