You can fairly easily change out English strings for Hebrew string manually. What you’ll want to do is open your file manager and located /wp-content/uploads/landing-pages/templates/lovely-sales-page/index.php and then find the english strings you would like to change, change them, and save.
Be careful not to update the template if prompted to in the future or you might lose your changes.
12 years has me using technical terms without second thought, very sorry.
Strings in the context I am using means mean language text / English Words.
When you open the template’s index.php file in a text editor, using the search and replace to find and switch English with Hebrew most likely will be the easiest path for editing the source file successfully.