Hi there, @rennay ! Thanks for taking the time to reach out to the Shopify Community Forums with your question! My name is Imogen. It’s great to meet you!
If you’re looking to edit the wording of specific sections of your checkout (or really any pages within your theme), then you should definitely look into our Default Theme Content Editing Tool! This allows you to edit the wording that appears in certain sections of your checkout, and also change the wording that appears when presenting specific errors in the checkout! The document I’ve linked shows the steps you need to follow to use the tool, but I’ll provide some supporting steps below for you!
First, login to your admin and go to ‘Online Store > Themes’. Then, click the ‘…’ icon next to the ‘customize’ button.
From there, you’ll be in the Default Contenting Editing Tool! You will want to click the three ‘…’ on the far right, and then select the ‘Checkout and System’ option.
From there, you’ll be looking at content specific to your checkout and triggered messages. You can user the ‘Filter Items’ bar to filter what specific wording/messages you want to change. So, for example, if you know the specific wording you want to change that you see in the checkout, you can type that wording into the ‘Filter Items’ box. From there, the message will generate as an option below in a text box. You can click that box, then write in whatever content you want, and then save the change! Then, whenever that specific wording would be presented to a customer, your custom wording is shown instead!
I hope you find this helpful, @rennay !