menu on the left in the admin theme

Hello,

Navigate to Theme Settings > White label and change the name.

You can read more about White Label here https://xtemos.com/docs-topic/how-to-rebrand-the-theme-white-label/

For the other text, You can change that text by using the Loco Translate plugin, here is our article on how to use it: https://xtemos.com/docs-topic/translate-woodmart-theme-with-loco-translate/

Best Regards,