In Magento 2, system emails such as order notifications, payment confirmations, registration confirmations, etc., can be edited using email templates. Below is the procedure on how to edit a system email in Magento 2:
- Log in to the Magento 2 admin console with your username and password.
- Go to "Marketing" in the main menu and select "Communications / Email Templates" in the submenu.
- Click the "Add New Template" button at the top right.
- Then select the template you want to edit from the list (e.g., New Order) and click the "Load Template" button.
- Add a name to the template that will serve as your reference.
- Under the template name, you have the subject name and template content, which you can then edit as you wish.
- Once the template is saved, it is important to set the use of the new template in the store, otherwise the default will be used. For example, for "New Order," set the template under "Stores / Settings / Sales / Sales Emails." In the "Orders" section, change the value for "New Order Confirmation Template."

By default, emails are made so that they have English text, which the system automatically translates based on loaded translations. If you are editing for one language, you can change the text. Below is an example of a change:
<p>{{trans "Once your package ships we will send you a tracking number."}}</p>
can be changed to:
<p>Ko bo vaš paket odposlan, vam bomo poslali številko za sledenje.</p>
After editing the email, you can preview the changes by clicking the "Preview Template" button.
