I want to start a blog in Spanish. Would anybody know what is my best option WordPress.com or WordPress.org and what is the difference?
WordPress.org is the home of the WordPress engine (blogging software)
WordPress.com is a free hosted service using the WordPress engine
If you go to WordPress.org you will be able to download the WordPress software and then install it to your own host or web server. On WordPress.com on the other hand you can register to get your own free hosted WordPress blog.