private static function register( $string_key, $translation ) {

		/**
		 * Converts string into reference object variable
		 * Uses the same logic as JS to create the same references
		 */
		$ref = '__' . $string_key;

		// Add it to the strings localized
		self::$strings[ $ref ] = $translation;

		// Remove the old key
		unset( self::$strings[ $string_key ] );
	}