WPForms Address field store full country name instead of country code

functions.php

<?php
/**
 * Use full country name instead of the country code.
 *
 * @param array $fields
 * @param array $entry
 * @param array $form_data
 * @return array
 */
function wpf_address_full_country( $fields, $entry, $form_data ) {
	
	// Get the array of all available countries. Array key is country code,
	// value is country name.
	$countries = wpforms_countries();

	// Loop through all the submitted fields
	foreach( $fields as $field_id => $field ) {
		
		// Look for address fields that have a country provided
		if ( !empty( $field['type'] ) && 'address' == $field['type'] && !empty( $field['country'] ) ) {

			// Presumably, the country code
			$country_code = $field['country'];

			// Make sure everything checks out
			if ( !empty( $countries[$country_code] ) ) {

				// Use country code to get full country name
				$country = $countries[$country_code];

				// Replace country code with full country
				$fields[$field_id]['country'] = $country;
				$fields[$field_id]['value']   = str_replace( $country_code, $country, $fields[$field_id]['value'] );
			}
		}
	}

	return $fields;
}
add_filter( 'wpforms_process_filter', 'wpf_address_full_country', 10, 3 );