In the Store settings → Checkout, you will find the following sections:
This way, your client will be asked to agree with those policies before proceeding to payment in the checkout:
Require phone number at checkout: choose whether a client is required to insert the phone number when making a purchase
Add a custom field to the checkout: collect additional information from your clients; you can also make this field required
Specify the preferred language for your store: it will automatically reflect in the shopping bag, checkout, and emails sent from your online store.