In this documentation, you'll learn how to edit the 'Apply Coupon' button text on the checkout page.
Here's what we're going to edit:

Follow along:
Step 1: Go to Loco from your WooCommerce dashboard
Click on 'Plugins' and select 'WooCommerce'.

Step 2: Search for the 'Apply Coupon' button text and edit it
Search for the 'apply coupon' text there. Change the translation text from here.

Make the changes as per your requirements.
Here's the final output:

This is how you can edit the 'Apply Coupon' button text on the Checkout page.