public static function register_taxonomies() {
		// Get the huge array of taxonomy data.
		$taxonomy_data = self::taxonomy_data();

		// Get the plugin settings where some taxonomies may be disabled.
		$settings = INVP::settings();

		$count = count( $taxonomy_data );
		for ( $i = 0; $i < $count; $i++ ) {
			// If the taxonomy is disabled in the settings, skip it.
			if ( ! isset( $settings['taxonomies'][ $taxonomy_data[ $i ]['args']['query_var'] ]['active'] )
				|| ! $settings['taxonomies'][ $taxonomy_data[ $i ]['args']['query_var'] ]['active'] ) {
				continue;
			}

			// Replace hyphens with underscores.
			$taxonomy_name = str_replace( '-', '_', $taxonomy_data[ $i ]['args']['query_var'] ?? '' );
			register_taxonomy( $taxonomy_name, INVP::POST_TYPE, $taxonomy_data[ $i ]['args'] );
		}
	}