You might need to let us know if you mean "for the instructor" or "for the student."
For example, the student can get a quick summary by going to their Moodle grade book.
An instructor can get a quick summary of activities/recourses by looking at their course. (Yes, a lot depends on how they have structured their course.)
For example, if the student wants to show the status of a course, they can use the Dashboard or their grade book.
In general, the answers to your questions is "yes." If you can't do these things directly, like changing the words to "...Submit QUIZ 1" you can modify moodle's internal code, if this wording is very important to you.
Others here on Moodle.org might provide more help to you. I just wanted to help get the conversation going.