modify woocommerce countries list

add_filter( 'woocommerce_countries', 'modify_woocommerce_country_names' );

function modify_woocommerce_country_names( $countries ) {

    // List of country codes to keep

    $allowed_countries = array(

        'ER', 'AO', 'DZ', 'AU', 'BD', 'BG', 'BJ', 'BO', 'BR', 'CA', 'CH'

    );

    // Loop through all countries and remove the ones that are not in the allowed list

    foreach ( $countries as $code => $name ) {

        if ( ! in_array( $code, $allowed_countries ) ) {

            unset( $countries[$code] );

        }

    }

    // Modify country names as per your list

    $countries['ER'] = 'Երևան';

    $countries['AO'] = 'Արագածոտն';

    $countries['DZ'] = 'Արարատ';

    $countries['AU'] = 'Արմավիր';

    $countries['BD'] = 'Գեղարքունիք';

    $countries['BG'] = 'Կոտայք';

    $countries['BJ'] = 'Լոռի';

    $countries['BO'] = 'Շիրակ';

    $countries['BR'] = 'Սյունիք';

    $countries['CA'] = 'Տավուշ';

    $countries['CH'] = 'Վայոց ձոր';

    // Return the modified countries array

    return $countries;

}