When you add new pages to your website, their random URLs are generated automatically.
If you rename the page, the URL will be automatically updated, too. Non-Latin symbols will be unrecognized and skipped, but no worries! You can edit the URLs of your pages at the page settings manually. For example, if your page title includes é, you can replace it with e in the URL.
From the toolbar on the left, open the Pages and navigation settings, and open the Page settings of a particular page:
Save the changes and update the website. 😉
If you have an online store, your product URLs are generated automatically - they depend on your product name and include a product ID by default. The product ID is not editable, but you may edit the product name, and the URL will change automatically.