WooCommerce - Customize States for Spain

functions.php

<?php
/**
 * Customize States for Spain
 */
add_filter( 'woocommerce_states', 'tgt_woocommerce_states' );

function tgt_woocommerce_states( $states ) {

	$states['ES'] = array(
		'La Coruña'              => __( 'La Coruña', 'woocommerce' ),
		'Álava'                  => __( 'Álava', 'woocommerce' ),
		'Albacete'               => __( 'Albacete', 'woocommerce' ),
		'Alicante'               => __( 'Alicante', 'woocommerce' ),
		'Almería'                => __( 'Almería', 'woocommerce' ),
		'Asturias'               => __( 'Asturias', 'woocommerce' ),
		'Ávila'                  => __( 'Ávila', 'woocommerce' ),
		'Badajoz'                => __( 'Badajoz', 'woocommerce' ),
		'Baleares'               => __( 'Baleares', 'woocommerce' ),
		'Barcelona'              => __( 'Barcelona', 'woocommerce' ),
		'Burgos'                 => __( 'Burgos', 'woocommerce' ),
		'Cáceres'                => __( 'Cáceres', 'woocommerce' ),
		'Cádiz'                  => __( 'Cádiz', 'woocommerce' ),
		'Cantabria'              => __( 'Cantabria', 'woocommerce' ),
		'Castellón'              => __( 'Castellón', 'woocommerce' ),
		'Ceuta'                  => __( 'Ceuta', 'woocommerce' ),
		'Ciudad Real'            => __( 'Ciudad Real', 'woocommerce' ),
		'Córdoba'                => __( 'Córdoba', 'woocommerce' ),
		'Cuenca'                 => __( 'Cuenca', 'woocommerce' ),
		'Gerona'                 => __( 'Gerona', 'woocommerce' ),
		'Granada'                => __( 'Granada', 'woocommerce' ),
		'Guadalajara'            => __( 'Guadalajara', 'woocommerce' ),
		'Guipúzcoa'              => __( 'Guipúzcoa', 'woocommerce' ),
		'Huelva'                 => __( 'Huelva', 'woocommerce' ),
		'Huesca'                 => __( 'Huesca', 'woocommerce' ),
		'Jaén'                   => __( 'Jaén', 'woocommerce' ),
		'La Rioja'               => __( 'La Rioja', 'woocommerce' ),
		'Las Palmas'             => __( 'Las Palmas', 'woocommerce' ),
		'León'                   => __( 'León', 'woocommerce' ),
		'Lérida'                 => __( 'Lérida', 'woocommerce' ),
		'Lugo'                   => __( 'Lugo', 'woocommerce' ),
		'Madrid'                 => __( 'Madrid', 'woocommerce' ),
		'Málaga'                 => __( 'Málaga', 'woocommerce' ),
		'Melilla'                => __( 'Melilla', 'woocommerce' ),
		'Murcia'                 => __( 'Murcia', 'woocommerce' ),
		'Navarra'                => __( 'Navarra', 'woocommerce' ),
		'Orense'                 => __( 'Orense', 'woocommerce' ),
		'Palencia'               => __( 'Palencia', 'woocommerce' ),
		'Pontevedra'             => __( 'Pontevedra', 'woocommerce' ),
		'Salamanca'              => __( 'Salamanca', 'woocommerce' ),
		'Santa Cruz de Tenerife' => __( 'Santa Cruz de Tenerife', 'woocommerce' ),
		'Segovia'                => __( 'Segovia', 'woocommerce' ),
		'Sevilla'                => __( 'Sevilla', 'woocommerce' ),
		'Soria'                  => __( 'Soria', 'woocommerce' ),
		'Tarragona'              => __( 'Tarragona', 'woocommerce' ),
		'Teruel'                 => __( 'Teruel', 'woocommerce' ),
		'Toledo'                 => __( 'Toledo', 'woocommerce' ),
		'Valencia'               => __( 'Valencia', 'woocommerce' ),
		'Valladolid'             => __( 'Valladolid', 'woocommerce' ),
		'Vizcaya'                => __( 'Vizcaya', 'woocommerce' ),
		'Zamora'                 => __( 'Zamora', 'woocommerce' ),
		'Zaragoza'               => __( 'Zaragoza', 'woocommerce' ),
	);
	return $states;
}