Add Kosovo as a checkout country in WooCommerce

functions.php

<?php

// Add Kosovo as a checkout country
add_filter('woocommerce_countries', 'snippetpress_add_kosovo');
function snippetpress_add_kosovo($countries) {
    // Add Kosovo to the list of countries
    $countries['XK'] = __('Kosovo', 'woocommerce');
    return $countries;
}

// Add Kosovo to the list of continents (EU)
add_filter('woocommerce_continents', 'snippetpress_add_kosovo_to_continents');
function snippetpress_add_kosovo_to_continents($continents) {
    // Add Kosovo to the list of European countries
    $continents['EU']['countries'][] = 'XK';
    return $continents;
}

// Add states (cities) for Kosovo
add_filter('woocommerce_states', 'add_kosovo_states');
function add_kosovo_states($states) {
    // Define the states (cities) in Kosovo
    $states['XK'] = array(
        '' => __('Your State Name', 'woocommerce'), // Replace with your own state name
        'pristina' => __('Pristina', 'woocommerce'),
        'peja' => __('Peja', 'woocommerce'),
        'prizren' => __('Prizren', 'woocommerce'),
        'mitrovica' => __('Mitrovica', 'woocommerce'),
        'gjilan' => __('Gjilan', 'woocommerce'),
        'gjakova' => __('Gjakova', 'woocommerce'),
        'ferizaj' => __('Ferizaj', 'woocommerce'),
        // Add more cities here
    );
    return $states;
}

// Implementation Steps:

// 1 - Copy the entire code from this Gist.
// 2 - Log in to your WordPress admin panel.
// 3 - Go to "Appearance" > "Theme Editor."
// 4 - Open the functions.php file for editing. If you're using a child theme, make sure you're editing the child theme's functions.php file.
// 5 - Paste the copied code at the end of the functions.php file.
// 6 - Modify the state names and cities within the add_kosovo_states function according to your requirements.
// 7 - Save the changes.

// Your website should now have Kosovo added as a checkout country with the specified states (cities).
// Remember that modifying theme files directly can be risky, especially if you're not familiar with PHP and WordPress. 
// It's recommended to create a backup of your website or use a child theme to make these changes safely.