diff --git a/generator/src/Command/GenerateLocaleId.php b/generator/src/Command/GenerateLocaleId.php
index 9057839..3795520 100644
--- a/generator/src/Command/GenerateLocaleId.php
+++ b/generator/src/Command/GenerateLocaleId.php
@@ -56,8 +56,6 @@ public function render(
 
         namespace ICanBoogie\CLDR;
 
-        use InvalidArgumentException;
-
         final class LocaleId
         {
             /**
diff --git a/lib/GitHub/UrlResolver.php b/lib/GitHub/UrlResolver.php
index 5e378b8..8f99a01 100644
--- a/lib/GitHub/UrlResolver.php
+++ b/lib/GitHub/UrlResolver.php
@@ -12,9 +12,8 @@ class UrlResolver
 {
 	public const DEFAULT_ORIGIN = "https://raw.githubusercontent.com/unicode-org/cldr-json/";
 	public const DEFAULT_VERSION = "45.0.0";
-	public const DEFAULT_VARIATION = self::VARIATION_MODERN;
+	public const DEFAULT_VARIATION = self::VARIATION_FULL;
 
-	public const VARIATION_MODERN = 'modern';
 	public const VARIATION_FULL = 'full';
 
 	/**
diff --git a/lib/LocaleId.php b/lib/LocaleId.php
index f9b9c52..b6669e5 100644
--- a/lib/LocaleId.php
+++ b/lib/LocaleId.php
@@ -8,12 +8,13 @@
 
 namespace ICanBoogie\CLDR;
 
-use InvalidArgumentException;
-
 final class LocaleId
 {
     /**
      * Whether a locale ID is available.
+     *
+     * @param string $value
+     *     A locale identifier; for example, fr-BE
      */
     public static function is_available(string $value): bool
     {
@@ -25,6 +26,9 @@ public static function is_available(string $value): bool
     }
 
     /**
+     * @param string $value
+     *     A locale identifier; for example, fr-BE
+     *
      * @throws LocaleNotAvailable
      */
     public static function assert_is_available(string $value): void
@@ -33,31 +37,27 @@ public static function assert_is_available(string $value): void
             or throw new LocaleNotAvailable($value);
     }
 
-    /**
-     * @var array<string, self>
-     *     Where _key_ is a locale identifier.
-     */
-    private static array $instances = [];
-
     /**
      * Returns a {@see LocaleId} of a value.
      *
      * Note: If the locale has a parent locale, that locale is used instead.
      *
      * @param string $value
-     *     A locale identifier.
+     *     A locale identifier; for example, fr-BE
      *
-     * @throws InvalidArgumentException if the locale is not available.
+     * @throws LocaleNotAvailable
      */
     public static function of(string $value): self
     {
+    	static $instances;
+
         self::assert_is_available($value);
 
         if (isset(self::PARENT_LOCALES[$value])) {
             $value = self::PARENT_LOCALES[$value];
         }
 
-        return self::$instances[$value] ??= new self($value);
+        return $instances[$value] ??= new self($value);
     }
 
     private function __construct(
diff --git a/tests/GitHub/UrlResolverTest.php b/tests/GitHub/UrlResolverTest.php
index 36197c6..817a69e 100644
--- a/tests/GitHub/UrlResolverTest.php
+++ b/tests/GitHub/UrlResolverTest.php
@@ -24,12 +24,12 @@ public static function provide_resolve(): array
 
 			"annotations-derived/{locale}/annotations" => [
 				"annotations-derived/fr-CA/annotations",
-				"https://raw.githubusercontent.com/unicode-org/cldr-json/$v/cldr-json/cldr-annotations-derived-modern/annotationsDerived/fr-CA/annotations.json"
+				"https://raw.githubusercontent.com/unicode-org/cldr-json/$v/cldr-json/cldr-annotations-derived-full/annotationsDerived/fr-CA/annotations.json"
 			],
 
 			"annotations/{locale}/annotations" => [
 				"annotations/hi-Latn/annotations",
-				"https://raw.githubusercontent.com/unicode-org/cldr-json/$v/cldr-json/cldr-annotations-modern/annotations/hi-Latn/annotations.json"
+				"https://raw.githubusercontent.com/unicode-org/cldr-json/$v/cldr-json/cldr-annotations-full/annotations/hi-Latn/annotations.json"
 			],
 
 			"bcp47/calendar" => [
@@ -44,7 +44,7 @@ public static function provide_resolve(): array
 
 			"cal-buddhist/{locale}/ca-buddhist" => [
 				"cal-buddhist/de-BE/ca-buddhist",
-				"https://raw.githubusercontent.com/unicode-org/cldr-json/$v/cldr-json/cldr-cal-buddhist-modern/main/de-BE/ca-buddhist.json"
+				"https://raw.githubusercontent.com/unicode-org/cldr-json/$v/cldr-json/cldr-cal-buddhist-full/main/de-BE/ca-buddhist.json"
 			],
 
 			"core/supplemental/plurals" => [
@@ -64,32 +64,32 @@ public static function provide_resolve(): array
 
 			"dates/{locale}/ca-gregorian" => [
 				"dates/ko-KP/ca-gregorian",
-				"https://raw.githubusercontent.com/unicode-org/cldr-json/$v/cldr-json/cldr-dates-modern/main/ko-KP/ca-gregorian.json"
+				"https://raw.githubusercontent.com/unicode-org/cldr-json/$v/cldr-json/cldr-dates-full/main/ko-KP/ca-gregorian.json"
 			],
 
 			"dates/{locale}/dateFields" => [
 				"dates/ko-KP/dateFields",
-				"https://raw.githubusercontent.com/unicode-org/cldr-json/$v/cldr-json/cldr-dates-modern/main/ko-KP/dateFields.json"
+				"https://raw.githubusercontent.com/unicode-org/cldr-json/$v/cldr-json/cldr-dates-full/main/ko-KP/dateFields.json"
 			],
 
 			"localnames/{locale}/languages" => [
 				"localenames/fr-MA/languages",
-				"https://raw.githubusercontent.com/unicode-org/cldr-json/$v/cldr-json/cldr-localenames-modern/main/fr-MA/languages.json"
+				"https://raw.githubusercontent.com/unicode-org/cldr-json/$v/cldr-json/cldr-localenames-full/main/fr-MA/languages.json"
 			],
 
 			"misc/{locale}/listPatterns" => [
 				"misc/ms-SG/listPatterns",
-				"https://raw.githubusercontent.com/unicode-org/cldr-json/$v/cldr-json/cldr-misc-modern/main/ms-SG/listPatterns.json"
+				"https://raw.githubusercontent.com/unicode-org/cldr-json/$v/cldr-json/cldr-misc-full/main/ms-SG/listPatterns.json"
 			],
 
 			"numbers/{locale}/currencies" => [
 				"numbers/en-150/currencies",
-				"https://raw.githubusercontent.com/unicode-org/cldr-json/$v/cldr-json/cldr-numbers-modern/main/en-150/currencies.json"
+				"https://raw.githubusercontent.com/unicode-org/cldr-json/$v/cldr-json/cldr-numbers-full/main/en-150/currencies.json"
 			],
 
 			"numbers/{locale}/numbers" => [
 				"numbers/en-150/numbers",
-				"https://raw.githubusercontent.com/unicode-org/cldr-json/$v/cldr-json/cldr-numbers-modern/main/en-150/numbers.json"
+				"https://raw.githubusercontent.com/unicode-org/cldr-json/$v/cldr-json/cldr-numbers-full/main/en-150/numbers.json"
 			],
 
 			"rbnf/{language}" => [
@@ -99,12 +99,12 @@ public static function provide_resolve(): array
 
 			"segments/{language}/suppressions" => [
 				"segments/de/suppressions",
-				"https://raw.githubusercontent.com/unicode-org/cldr-json/$v/cldr-json/cldr-segments-modern/segments/de/suppressions.json"
+				"https://raw.githubusercontent.com/unicode-org/cldr-json/$v/cldr-json/cldr-segments-full/segments/de/suppressions.json"
 			],
 
 			"units/{locale}/units" => [
 				"units/pt-MO/units",
-				"https://raw.githubusercontent.com/unicode-org/cldr-json/$v/cldr-json/cldr-units-modern/main/pt-MO/units.json"
+				"https://raw.githubusercontent.com/unicode-org/cldr-json/$v/cldr-json/cldr-units-full/main/pt-MO/units.json"
 			],
 
 		];