Impossible to change Get Course button text

I tried everything to change the Get Course button text, but it is impossible.

I am using a translated page to Portuguese, but the plug-in don’t translate the button text.

I tried CSS, add to cart button pluguin and Loco translate, but nothing works.

If it is not possible to change the button text, at least fix the translation to Portuguese.

The page I need help with: [log in to see the link]