Master Study LMS Pro – Questions

Hello! I have some more questions:

1. is it possible to add a private course?
Example: The student only “purchases” the course if the teacher /
platform administrator allows it. It would be a private / closed
course (no price). Is it possible to do that?

2. I am looking to develop a course page using the Master Study LMS
Pro, however, I would like it to be modular. Example: When developing,
are there shortcodes that I can use to put them as I want on the page?
I want the part I put just to show the curriculum of the course in a
certain area and etc …
I thought the “Frontend Course Builder” tool would do that, but
apparently it only serves to create the courses.

3. How can I translate certain areas of the course environment?
Example: “<- Back to Dashboard”, I would like to translate it in to
Brazilian Portuguese, since the platform itself will be in Brazilian Portuguese. I just
used a plugin called “Loco translate”, I translated about 500 strings
manually however, there were still words that didn’t get that
translation, I believe that it will be necessary to translate them in
the code. Should I pay attention to something not to give error in the
plugin? Is there an example of how I can do this?

I consider the plugin’s advantage to be easy to learn tools, however,
I consider the documentation cloudy, example: “Group Courses” tool is
just to buy the course for a “group” of a company?
Account already linked to the course: can I create a group for them?
Is it compatible with the idea of ​​a private course (mentioned in the
first question)?