Hi she26703,
Thanks for reaching to us.
1. Fields
Login and Registration are default WooCommerce functionalities and WoodMart does not control it. For specialized assistance and potential solutions, I kindly suggest that you reach out directly to the author plugin’s support team https://wordpress.org/support/plugin/tabby-checkout/, who are better equipped to provide you with the guidance you requires or You need to find a third party plugin to achieve more functionality that best suits you.
2. Registration
Navigate to Theme Settings > My account / Login / Register to change text https://prnt.sc/uu4pCrHm0Bzt
Regards,