Youzify - BuddyPress Validate Username with Latin Characters

yzc_custom_validate_username.php

<?php

// Function to validate username with Latin characters
function yzc_custom_validate_username($valid, $username) {
    // Allow Latin characters and numbers
    if (preg_match('/^[a-zA-Z0-9ñÑáéíóúÁÉÍÓÚüÜ]*$/', $username)) {
        return true;
    }
    return $valid;
}

// Hook the custom validation function
add_filter('validate_username', 'yzc_custom_validate_username', 10, 2);

add_filter('sanitize_user', 'non_strict_login', 10, 3);
function non_strict_login( $username, $raw_username, $strict ) {
     if( !$strict )
        return $username;
     return sanitize_user(stripslashes($raw_username), false);
}