url are the best tool for optimize your website. I would say that if is a Spanish target it would be better to make Spanish url when is Spanish and English url when is English because it will help you to get more seo.
for example one keyword in English is bags and you have a www.example.com/bags because you talk about your bags, but in Spanish will be bolsos then is better to have www.example.com/bolsos or www.example.com/es-mx/bolsos the URL is one of the most important things on SEO and you can check that when you are on the on page grader