Embarrassing grammatical errors

Hi there,
I would like to address the fact that there is some embarrassing text and grammatical errors showing on my site that are part of the plugin and can’t be changed. For example, when clicking on a lesson in the curriculum, a popup shows with the following text “Hey there, great course, right? Do you like this course? All of the most interesting lessons further. In order to continue you just need to purchase it. Enroll course.”

This does not reflect well on my business. How do I change this text? For the time being, I’ve hidden the message with CSS. But this is not the only instance. There are more grammatical errors. I’ve fixed some (the automatic emails for example). But this needs to be addressed!